Which one of the following is the oldest era in Geological History determining the age of various rock types?

A geographical grid has :

1. Lines that run east to west around the globe to mark latitude

2. Lines that run north to south from north pole to south pole indicate longitude

Which of the statements given above is/are correct?

First World Environment Day (WED) was celebrated in which year?

Which one of the following is the usual unit of measurement for Air Pressure used in India?

In which one of the following states "Roopkund' lake is located?

Which one of the following statements is NOT correct?

Which one of the following soils is ideal for growing cotton?

Which one of the following provisions of the Constitution of India deals with District Planning Committee?

Consider the following statements about Attorney General in India:

1. She/he is the first law officer of the Government of India

2. She/he has a right to speak in any House of Parliament without any right to vote

3. She/he is appointed by the President of India

4. She/he must have the same qualification as are required by a Judge of Supreme Court

How many of the statements given above is/are correct?