"Socialist” was implicit in the constitution, but made explicit by _______?

Consider the following rivers:
1. Narmada
2. Brahamputra
3. Godavari
4. Krishna
Which among the following is the correct set of originating places of the above rivers?

Consider the following statements about Red Sanders in India:

1. Red Sanders is endemic to South Eastern portion of Indian peninsula
2. It is a moderate sized coniferous tree
3. It is a protected species under the Convention on International Trade in Endangered Species (CITES)

Which of the above statements is/are correct?

The service tax in India is __:

Consider the following statements:
1. Revenue receipts of the government represent income without accompanied liability
2. Revenue expenditure of the government represent consumption without accompanied asset
Which among the above statements is / are correct?