Which one of the following Articles of the Indian Constitution has not so far been used?

Which one of the following is not mentioned as a form of Emergency in the Constitution of India?

Which one of the following is not a circumstance for proclamation of Emergency by the President of India under Article 352 of the Constitution of India ?

Under which Article of the Indian Constitution President’s Rule can be imposed in a State?

Which one among the following pairs of Articles relating to the Fundamental Rights cannot be suspended during the enforcement of Emergency under Article 359 of the Indian Constitution?

Which Article of the Indian Constitution deals with the proclamation of Emergency ?