Explanation

Under Article 352, a proclamation of National Emergency (on grounds of war, external aggression or armed rebellion) empowers the President, under Article 359, to suspend the right to move the courts for the enforcement of Fundamental Rights (Articles 20 and 21 being excepted by the 44th Amendment). Parliament cannot suspend Fundamental Rights by ordinary legislation, no amendment can do it outside the emergency framework, and the judiciary has no such power. The President during a National Emergency is the correct answer.