The correct answer is option 1 - IV A. The fundamental duties of Indian citizens are enshrined in Part IV A of the Indian Constitution. This part was added through the 42nd Constitutional Amendment Act of 1976. It lays down ten fundamental duties that citizens of India must fulfill. These duties include respecting the Constitution, promoting harmony and the spirit of common brotherhood, safeguarding public property, preserving the rich cultural heritage of the country, and protecting the environment. It is important to note that these fundamental duties are non-justiciable, meaning they are not enforceable in a court of law. However, they serve as a moral and ethical framework for citizens to contribute to the well-being of the nation.