The correct answer is option 'B' - the President. The President of India has the authority to remove the Chairman or any other member of the Union Public Service Commission (UPSC) from office.

Under Article 317 of the Indian Constitution, the Chairman or any other member of the UPSC can be removed from office by the President on the grounds of misbehavior or incapacity. However, the President can only take this action after the Supreme Court, on a reference made to it by the President, has held an inquiry into the allegations against the Chairman or member and has recommended his removal.

Below are the details explaining the answer:

Authority of the President:
- According to Article 317 of the Indian Constitution, the President has the authority to remove the Chairman or any other member of the UPSC from office.
- This authority is granted to the President to ensure the independence and integrity of the UPSC.

Grounds for removal:
- The Chairman or member of the UPSC can be removed from office on the grounds of misbehavior or incapacity.
- Misbehavior refers to any act or behavior that is considered improper, unethical, or against the code of conduct expected from a member of the UPSC.
- Incapacity refers to the inability of the Chairman or member to fulfill their duties due to physical or mental incapacity.

Procedure for removal:
- The President can only remove the Chairman or member of the UPSC after an inquiry has been conducted by the Supreme Court.
- The President refers the matter to the Supreme Court, which then holds an inquiry into the allegations against the Chairman or member.
- Based on the findings of the inquiry, the Supreme Court makes a recommendation to the President regarding the removal of the Chairman or member.
- The President, after considering the recommendation of the Supreme Court, can take the decision to remove the Chairman or member from office.

Conclusion:
In conclusion, the President of India has the authority to remove the Chairman or any other member of the UPSC from office on the grounds of misbehavior or incapacity. This authority is exercised after an inquiry conducted by the Supreme Court and upon receiving a recommendation from the Court. The provision for the removal of the Chairman or members of the UPSC by the President ensures the independence and integrity of the UPSC and helps maintain the credibility of the institution.