The President of India can be impeached under specific circumstances as per the Constitution. Which of the following conditions of Presidential impeachment is/are mentioned in the Constitution?

1. Violation of the Constitution of India.

2. Gross misconduct or abuse of power while in office.

3. Proved incapacity to discharge the functions of the President.

4. Engagement in acts of treason or war against the nation.

Select the correct answer using the codes given below: