The 52nd Constitutional Amendment Act of 1985 deals with the issue of defection and disqualification. Defection refers to the act of switching political parties by elected representatives, which often leads to political instability and challenges the integrity of democratic processes. This amendment was introduced to address these concerns by setting guidelines for disqualification of members who defect from their political party. It established the criteria and procedures for disqualification and laid down the powers and role of the Speaker of the Parliament or State Legislature in such cases. This amendment aimed to discourage political defections and maintain the stability and integrity of the political system. It is important to note that the other options listed in the question, such as Union Territories, extending reservation, and abolition of privy purses, are unrelated to the 52nd Constitutional Amendment Act of 1985.