Solution:Article 352- If the President is satisfied that a grave emergency exists, whereby the security of India or any part of the Territory thereof is threatened, whether by war or external aggression or armed rebellion, then the President may by Proclamation make a declaration of Emergency.Article 355- It shall be the duty of the Union to protect States against external aggression and internal disturbance.
Article 356- If the President, on receipt of report from the Governor of the State or otherwise, is satisfied that a situation has arisen in which the Government of the State cannot be carried on in accordance with the provisions of this Constitution, then the President may declare the State under the President's Rule.
Article 360- If the President is satisfied that a situation has arisen whereby the financial stability or credit of India or any part of the Territory thereof is threatened, he may by a Proclamation make a declaration of Financial Emergency.