Answer is a is correct. According to Section 2(6) of the BNS, death refers to the death of a human being. Therefore, option (a) is the correct answer.

Answer is c is correct. The Mountbatten Plan has also been known as 3rd June Plan led to the enactment of Indian Independence Act, 1947. Therefore, option (c) is the correct answer.

Answer is b is correct. Article 16(4A) of the Constitution was inserted by 77th Amendment. Therefore, option (b) is the correct answer.

Answer is b is correct. When the parties to a contract agree to substitute the existing contract with a new contract then it is called as Novation. Therefore, option (b) is the correct answer.

Answer is b is correct. Section 28 of the Indian Contract Act, 1872, provides that agreement in restraint of legal proceedings is void. Therefore, option (b) is the correct answer.