As per Article 324 of the Constitution of India, any other Election Commissioner or a Regional Commissioner shall not be removed from office except on the recommendation of the:

Correct option is D

Under Article 324(5) of the Indian Constitution:
· The Chief Election Commissioner (CEC) can only be removed like a Supreme Court judge (by impeachment).
· Other Election Commissioners or Regional Commissioners can only be removed based on the recommendation of the CEC.