In which of the following categories of cases has Supreme Court of India, the power to decide:
1. A reference made by the President on the question of law or fact
2. A case involving interpretation of the Constitution
3. A case involving a substantial question of law of general importance
4. A case where the constitutionality of any law has been challenged

A. 1, 2 and 3

B. 1, 2 and 4

C. 1, 3 and 4

D. 2, 3 and 4

Answer: Option D