The correct answer is option 'D' - Andaman and Nicobar Islands.

Explanation:
The southernmost point of India is located in the Andaman and Nicobar Islands. Let's break down the explanation:

1. Geographical Location:
- The Andaman and Nicobar Islands are an archipelago situated in the Bay of Bengal at the southeastern edge of the Indian subcontinent.
- These islands are a Union Territory of India and are known for their pristine beaches, rich biodiversity, and unique indigenous tribes.

2. Southernmost Point:
- The southernmost point of India is known as Indira Point or Pygmalion Point.
- Indira Point is located on Great Nicobar Island, which is the southernmost and largest of the Nicobar Islands.
- It lies at a latitude of approximately 6 degrees 45 minutes north.

3. Distance from Mainland India:
- The Andaman and Nicobar Islands are located quite far from mainland India.
- The distance between Indira Point and the nearest point of mainland India (located in the state of Tamil Nadu) is approximately 150 km (93 miles).

4. Importance and Significance:
- The southernmost point of India holds geographical significance as it marks the southern extremity of the country.
- It also serves as a navigational reference point for ships and vessels traveling in the Bay of Bengal.

In conclusion, the southernmost point of India is located in the Andaman and Nicobar Islands, specifically on Great Nicobar Island. This location, known as Indira Point or Pygmalion Point, holds significance both geographically and navigationally.

Cape Comorin, rocky headland on the Indian Ocean in Tamil Nadu state, southeastern India, forming the southernmost point of the subcontinent.