The constitution of India derives its ultimate authority from ____?

The rate of water erosion can increase if there is :

Apart from saving foreign exchange, the government of India wishes to reap the environment dividend by its Ethanol Blending Programme. What happens to Gasoline when Ethanol is blended in it?
1.Octane number of Gasoline is raised
2.Energy content per volume of the fuel mixture is increased
3.The engine is less likely to suffer damage
Choose the correct option from the codes given below:

With reference to the Special Economic Zones, which among the following statements is / are correct?
1.The SEZ don't need to comply with the Industrial Disputes Act 1947
2.A SEZ does not require a license for imports
Choose the correct option from the codes given below:

Consider the following statements about the Cabinet Committee on Security (CCS):

1. The committee is chaired by the Home Minister
2. The committee is responsible for decisions on external as well as internal security

Which of the above statements is/are correct?