Who among the following holds office during the pleasure of the President of India ?

Under Article 156(1) the Governor of a State "shall hold office during the pleasure of the President", so the President can remove a Governor at any time, although B.P. Singhal v Union of India (2010) held that this power cannot be used arbitrarily. The Chief Election Commissioner, the Comptroller and Auditor-General and the Chairman of the UPSC have security of tenure: the first two can be removed only in the manner of a Supreme Court judge, and the UPSC Chairman only on the grounds in Article 317.