In the Indian constitutional scheme, the organ that interprets a law and decides whether it is valid is

Explanation

1. 01

   The legislature makes law, the executive carries it out, and the judiciary interprets it and tests it against the Constitution.

2. 02

   That testing power is judicial review, and it is what allows a court to strike down a law that violates a Fundamental Right.

3. 03

   The Attorney General is the government's chief legal adviser, not a judge, and gives opinions rather than rulings.