The correct answer is option 2, Tenth Schedule. The Tenth Schedule of the Indian Constitution, also known as the Anti-Defection Law, contains provisions related to disqualification of Members of Parliament (MPs) and Members of Legislative Assembly (MLAs) on grounds of defection. Defection refers to the act of changing political allegiance from one party to another or going against the party line.

The Tenth Schedule was added to the Constitution in 1985 to address the issue of political defections and promote stability in the political system. It sets guidelines for the Speaker/Chairperson to decide on disqualification cases and lays down the criteria for determining defection. The schedule also lists the exceptions to disqualification, such as when two-thirds of the elected members of a party have agreed to a merger.

Overall, the Tenth Schedule plays an important role in maintaining the integrity and discipline of political parties in India.