Correct option is A
Both A and R are true and R is the correct explanation of A.
Statement 1 - Assertion (A): is correct
Article 256 of the Indian Constitution relates to the obligation of states to follow the laws made by Parliament and the executive power of the Union with respect to certain matters. It states that the executive power of every state shall be so exercised as to ensure compliance with the laws made by Parliament and any existing laws which apply in that state.
Statement 2- Reason (R) is correct: The government of India can give necessary direction to the states by using its executive powers.