Who among the following holds office during the pleasure of the Presi...
Governors of the states, Attorney General of India, Civil Services Personal, Council of Ministers and Prime Minister hold the office during pleasure of President. The chairman and members of UPSC do not hold office during pleasure of the President, in fact they hold a fixed tenure.
What is parliament ? --- LS + RS + President
Who appoints PM and Council of Ministers ? --- President
How can they (PM + Council of Mini) be removed ? ---- Passing of No confidence motion
Who assents/approves No-confidence motion? ----- President
When hung parliament is there who is powerful? ----- President (uses its discretionary power to appoint PM)
So President can appoint another PM at times comes according to situation while if you observe PM and Council ministers are at the pleasure of President the same PM and Council of ministers as an MP will be at the pleasure of Parliament (People) and not the President. So here his pleasure means that the President being head of the state convinced that parliament has proved the office holders, be it PM, CEC, UPSC etc. are not worthy enough to hold that post.
Hence, option A is correct.