Consider the following activities:

I. Production of crude oil-free

II. Refining, storage and distribution of petroleum

III. Marketing and sale of petroleum products

IV. Production of natural gas

How many of the above activities are regulated by the Petroleum and Natural Gas Regulatory Board in our country?

How many Delimitation Commissions have been constituted by the Government of India till December 2023?

Consider the following:

1. Demographic performance

2. Forest and ecology

3. Governance reforms

4. Stable government

5. Tax and fiscal efforts

For the horizontal tax devolution, the Fifteenth Finance Commission used how many of the above as criteria other than population area and income distance? 

Consider the following organizations/bodies in India :

1. The National Commission for Backward Classes

2. The National Human Rights Commission

3. The National Law Commission

4. The National Consumer Disputes Redressal Commission

How many of the above are constitutional bodies?