Indian Depository Receipt- IDR is a financial instrument. It is issued  by domestic depository to the Indian citizens against the shares of foreign company. IDR is denominated in Indian rupees. It helps issuing company, i.e. foreign companies to raise capital from Indian securities market.

Global Depository Receipt- GDR is issued by a country's bank against the shares of a foreign company which is not traded in their domestic stock exchange. GDR is issued in more than one country. It is a negotiable instrument.

American Depository Receipt- ADR is a negotiable instrument. It is issued by American Bank against the shares of foreign company that are traded in U.S. Stock market. ADR is denominated in US Dollars. 

Semantic errors are problems with a program that runs without producing error messages but doesn't do the right thing. Example: An expression may not be evaluated in the order you expect, yielding an incorrect result.

• A syntax error in computing is a mistake within the syntax of coding or programming language, entered by a programmer. Syntax errors are caught by a software program called a compiler, and therefore the programmer must fix them before the program is compiled then run.
• When a command appears during a program’s ASCII text file that doesn't conform to the programming language syntax, the code can't be compiled, and therefore the resulting error is named a syntax error.

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राज्य सभा एक स्थायी सदन है और यह भंग नहीं होता। तथापि, प्रत्येक दो वर्ष बाद राज्य सभा के एक-तिहाई सदस्य सेवा-निवृत्त हो जाते हैं। पूर्णकालिक अवधि के लिए निर्वाचित सदस्य छह वर्षों की अवधि के लिए कार्य करता है। किसी सदस्य के कार्यकाल की समाप्ति पर सेवानिवृत्ति को छोड़कर अन्यथा उत्पन्न हुई रिक्ति को भरने के लिए कराया गया निर्वाचन 'उप-चुनाव' कहलाता है।

उप-चुनाव में निर्वाचित कोई सदस्य उस सदस्य की शेष कार्यावधि तक सदस्य बना रह सकता है जिसने त्यागपत्र दे दिया था या जिसकी मृत्यु हो गई थी या जो दसवीं अनुसूची के अधीन सभा का सदस्य होने के लिए निरर्हित हो गया था।

Albert got a medical certificate from Dr. Ernest Weil. But Yuri told him to get a reference in writing from Mr. Koch. Mr. Koch was Albert’s Mathematics teacher. He had a very good opinion about Albert. He was very much impressed by Albert’s knowledge of his subject. He was different from other teachers. He was very cooperative and helpful. So Albert met Mr. Koch. He willingly gave Albert the reference that he wanted. Mr. Koch asked Albert if he should write that he was not able to teach him anymore. Actually, Albert was so intelligent. He admitted that it was the only truth. Mr. Koch wrote that Albert was only wasting his time in his class. In fact, Albert would soon be able to teach him. Albert tried to be modest. He told Mr. Koch that he enjoyed his classes. In a way, Mr. Koch was the only good teacher who never pretended to be what he was not.

Viroids are free RNA molecules of low molecular weight without any protein coat while viruses can have either RNA or DNA molecules encapsulated in a protein coat. Viroids are smaller in size than the viruses. Viroids infect only plants whereas virus infects all types of organisms. In viroids, protein coat is absent whereas in viruses a protein covering or a coat called as capsid is present around the genetic material.

Purka – Means inhalation

A developmental assessment for children under age 3 is an attempt to assess various aspects of the child's functioning, including areas such as cognition, communication, behavior, social interaction, motor and sensory abilities, and adaptive skills.

The scene is set in a school where Taplow arrives to do extra work on the last day for Mr. Crocker-Harris as he missed a day before. He finds Frank, a science teacher in the school. Frank asked him his name and the reason he is there that day. Taplow studies in the lower fifth standard and is about to get his result from his teacher Mr. Harris. Mr. Crocker-Harris usually reveals the result on the last day of school and unlike every other teacher, he follows the rules and regulations strictly.

They both started having a conversation where Frank asked him several questions. We don’t see Mr. Crocker-Harris in the whole chapter but we get to know a lot about him.

Taplow wants to take science as a remove because he finds the subject extremely interesting. Frank, on the other hand, doesn’t like what he teaches in the school. Mr. Croker-Harris is ‘hardly human’ as he never shrivels up. He told Taplow that he will get what he deserves. Nothing less and nothing more and this makes him tensed. Taplow further imitates Mr. Harris twice in front of Frank.

Franks admits that he envies Mr. Crocker-Harris because of the effect he has on them. Taplow told him that he never shows his emotions like other teachers and never beats them up like other masters.

He is not a sadist.

As they were deeply engaged in a conversation, Millie enters and comes with a shopping bag. She asked Taplow to go out and come back in a quarter of an hour as Mr. Crocker-Harris will be late. If her husband arrives earlier, she will take the blame. She further gives him a prescription and instructs him to purchase medicines for her from the chemist. Taplow follows and goes away to do the job.