Which Constitutional Amendment added Fundamental Duties in the Constitution?

Correct option is A

The correct answer is (a) Forty-Second Amendment Act, 1976
 The Forty-Second Amendment Act of 1976, also known as the Indira Gandhi Amendment, added a new Part IV-A to the Indian Constitution entitled "Fundamental Duties."
 This Part IV-A comprises ten fundamental duties that every citizen of India is expected to follow.
 There are 11 Fundamental Duties for Indian Citizens formulated on the lines of moral, ethical and culture code of conduct followed by people.
 They were based on the recommendations of the Swaran Singh Committee.
 The 11th fundamental duty was added through the 86th Constitutional Amendment in 2002.
 The Forty-seventh Amendment of the Constitution of India, officially known as The Constitution (Forty-seventh Amendment) Act, 1984, amended the Ninth Schedule to the Constitution, and added 14 legislations relating to land reforms, enacted by the States of Assam, Bihar, Haryana, Tamil Nadu, Uttar Pradesh and West Bengal and the union territory of Goa, Daman and Diu.