Council of Ministers is collectively responsible to whom?

Which of the following statements about the ministers in the country is/are correct?

The total number of members in the Union Council of Ministers in India shall not exceed

What percentage of the total number of members of Lok Sabha can be the total number of Union Council of Ministers?

Who was the Law Minister in the first Cabinet of post-independence India?

The Parliament of India exercises control over the functions of the Council of Ministers through 1. Adjournment motion 2. Question hour 3. Supplementary questions