The Andaman and Nicobar Islands are a union territory of India, made up of a large group of islands in the Bay of Bengal.
Exam answer keys often list the figure as around 324 islands, though the exact count differs by source depending on whether small islets and rocks are included.
What matters for the exam is remembering that this union territory is a large archipelago with an approximate count near this figure, not a single or small number of islands.