The correct answer is "2 only." The Lok Sabha has the exclusive power to pass a motion of no-confidence against the Council of Ministers, which can lead to their resignation if they lose the confidence of the majority in the House. In contrast, the declaration of Emergency does not require exclusive ratification by the Lok Sabha; it is a decision made by the President and requires approval from both Houses. Additionally, the process of impeachment of the President is not exclusive to the Lok Sabha, as it involves both houses of Parliament, thereby making option 2 the only correct exclusive power of the Lok Sabha in this context.