The correct answer is option 2: 1976.

In 1976, the Fundamental Duties were incorporated into the Constitution of India through the 42nd Amendment Act. These duties were added as a part of the Directive Principles of State Policy. The Fundamental Duties are a set of moral obligations that every citizen of India is expected to follow. They serve as a reminder of the responsibilities we have towards our nation and help in promoting a sense of civic consciousness and responsibility among the citizens. The 42nd Amendment Act was passed by the Parliament during the Emergency period and brought several changes in the Constitution. The addition of Fundamental Duties aimed to emphasize the importance of individual responsibilities in addition to rights.