list any four types of tab …

Left Aligned - This setting is often referred to as "left justified," but is technically called "flush left." It is typically the default setting when you create a new document. Left aligned text begins each line along the left margin of the document.
Right Aligned - This setting is also called "right justified," but is technically known as "flush right." It aligns the beginning of each line of text along the right margin of the document. As you type, the text expands to the left of the cursor. 
Centered - As the name implies, centered text is placed in the center of each line. As you type, the text expands equally to the left and right, leaving the same margin on both sides.
 Justified - Justified text combines left and right aligned text. When a block of text is justified, each line fills the entire space from left to right, except for the paragraph indent and the last line of a paragraph.