The main advantage of the parliamentary form of government is that

(a) the executive and legislature work independently.
(b) it provides continuity of policy and is more efficient.
(c) the executive remains responsible to the legislature.
(d) the head of the government cannot be changed without election.

M.Laxmikanth Chapter 3, Salient features of the Constitution.

• Parliamentary system is also known as Cabinet Government. It provides for collective responsibility of the executive to the legislature.

Another source: New NCERT, Std. 11, Introduction to Indian Constitution Chapter 4: Executive , Page 91 . Hence answer “C”.