Explanation:

The correct answer for this question is option 'B', which is "The emoluments of the President shall not be diminished during his term of office."

- "Emoluments" refer to the salary, allowances, and perquisites that a person receives in their official capacity. In the case of the President of India, these emoluments are determined by Parliament and are specified in the President's Emoluments and Allowances Act, 1951.
- The Constitution of India provides for certain safeguards to ensure the independence and impartiality of the President. One such safeguard is the provision that the emoluments of the President cannot be diminished during his/her term of office.
- This provision ensures that the President is not influenced by any financial considerations while exercising his/her constitutional duties and functions. It also provides for stability and certainty in the President's emoluments during his/her tenure.
- The provision applies to both the basic salary as well as any allowances or perquisites that the President is entitled to. However, it does not apply to any voluntary surrender of emoluments by the President.
- This provision is similar to the provision in the Constitution of the United States that prohibits any decrease in the salary of the President during his/her term of office.

In conclusion, the provision that "The emoluments of the President shall not be diminished during his term of office" is an important safeguard to ensure the independence and impartiality of the President of India.