The correct answer is option 4 - Part IV A.

In the Indian Constitution, the fundamental duties are mentioned in Part IV A. Part IV A was added to the Constitution through the 42nd Amendment Act of 1976. It consists of only one article, Article 51A, which outlines the ten fundamental duties of citizens. These duties are a set of moral obligations that citizens are expected to fulfill towards the nation. The fundamental duties were inspired by the Constitution of the Soviet Union and aim to promote unity, integrity, and a sense of national pride among citizens. It is important to note that the fundamental duties are not legally enforceable and do not grant any rights or privileges to the citizens.