Which are the sector of Indian …

Primary sources are created as close to the original event or phenomenon as it is possible to be. For example, a photograph or video of an event is a primary source. Data from an experiment is a primary source.  Secondary sources are one step removed from that. Secondary sources are based on or about the primary sources. For example, articles and books in which authors interpret data from another research team's experiment or archival footage of an event are usually considered secondary sources. Tertiary sources are one further step removed from that. Tertiary sources summarize or synthesize the research in secondary sources. For example, textbooks and reference books are tertiary sources.

Primary sector:
When we produce goods by exploiting natural resources, it is an activity of the primary sector.

Secondary sector:
Covers activities in which natural products are changed into other forms through ways of manufacturing, it is also called as industrial sector.

Tertiary sector:
These are the activities that help in the development of the primary & secondary sector. These activities by themselves do not produce good but they are an aid and support to the production process. Example: Transportation-Goods that are produced in the primary sector need to be transported by trucks or trains and than sold in the wholesale and retail shops; Storage—at times it is necessary to store these products in godowns, which is also a service made available. Communication -talking to others on telephone); Banking-borrowing money from the banks. Since these activities are generate services rather than goods it is also called Service sector.