The correct answer is option 4, which includes all elements: The Constitution of India, Statutes, Customary Law, and Case Law.

1. The Constitution of India is the supreme law of the land, providing a legal framework for the political process and defining fundamental political principles. Any law inconsistent with the Constitution is void.

2. Statutes are laws enacted by the legislative body of a country, state, or city - in India`s case, by the Parliament or State Assemblies.

3. Customary Law is a form of law derived from long-standing practices and traditions within a particular community or society. These laws hold legal force as long as they are not in conflict with statutory law or constitutional provisions.

4. Case Law, also known as precedent, is law developed by judges through decisions of courts. When an issue comes before a court and a decision is made, this becomes a precedent that other courts follow in similar cases.

So, all four sources are legitimate sources of Law in India, making option 4 the correct answer.