Under Article 317 of the Constitution, the President may remove a State Public Service Commission chairperson or member after a Supreme Court inquiry for:

misbehaviour

Article 317 provides the constitutional route for removal on misbehaviour, with the prescribed Supreme Court inquiry mechanism. B is not a removal ground. C applies to parliamentary confidence, not a PSC member. D is constitutionally irrelevant. B is incorrect: mere policy disagreement does not satisfy the stated fact or is a different institution/concept. C is incorrect: failure to win legislative confidence does not satisfy the stated fact or is a different institution/concept. D is incorrect: a change of government does not satisfy the stated fact or is a different institution/concept.