Explanations:The question asks about a group of islands that are part of the Indian Union. To understand this, it is important to know the geographical and administrative divisions of India. India is composed of 28 states and 8 union territories, which are directly governed by the central government. Among these union territories, the Andaman and Nicobar Islands are a significant group of islands located in the Bay of Bengal.
The Andaman and Nicobar Islands are a strategic location for India, situated between the Andaman Sea and the Bay of Bengal. They consist of 572 islands, of which only 38 are inhabited. The islands are known for their rich biodiversity, including unique flora and fauna, and are also important for their strategic military significance due to their location near the Strait of Malacca, a key maritime route.
The other options provided in the question are islands located in the Mediterranean Sea and are part of Greece. Hydra, Euboea, and Chios are all Greek islands and are not part of the Indian Union. Hydra is known for its historical significance and tourism, Euboea is the second-largest Greek island, and Chios is another significant Greek island. These islands are geographically and politically distinct from the Andaman and Nicobar Islands, which are part of India.
Therefore, the correct answer is the Andaman and Nicobar Islands, as they are the only group of islands among the options that are part of the Indian Union. Understanding the geographical and administrative divisions of India is crucial for identifying the correct answer in such questions.