The correct answer is option 3, Part VIII. Part VIII of the Indian Constitution deals with the Union Territories. The Union Territories are areas that are directly governed by the central government of India, unlike states that have their own elected governments. This part of the Constitution outlines the administrative and political provisions for the Union Territories. It defines the powers and responsibilities of the Lieutenant Governor or Administrator appointed by the President for each Union Territory. It also specifies the relationship between the central government and the Union Territories, including matters such as lawmaking, finance, and administration. Therefore, Part VIII is significant in ensuring the effective governance and administration of the Union Territories in India.