Which of the following is not a Union Territory?
Do not rush 'not' questions. This one wants the one that is different, and in Union Territories that is Goa. Goa has its own story that sets it apart. If you spot that story, you will pick it without confusion.
Ref: [MPPCS (Pre) 2010] | Majid Husain, Geography of India, and NCERT Geography textbooks discuss Union Territories and explain the Indian geographical features and patterns that support the correct answer for this question.