The correct option is D Either (a) or (b) or (c)
Article 2 of the Constitution of India declares that the Parliament may by law admit into the Union, or establish, new states on such terms and condition as it thinks fit. Thus, the parliament can acquire any foreign territory as a part of India and can admit it into union territories, or into a new state or a new union territory or merge it with existing states. e.g., Sikkim and Goa.