The correct answer is option C) Kanyakumari.

- The Indian peninsula is a large landmass that extends into the Indian Ocean. It is surrounded by three bodies of water - the Arabian Sea to the west, the Bay of Bengal to the east, and the Indian Ocean to the south.

The Eastern Coastal Plain:

- The eastern coastal plain is a narrow strip of land that runs along the eastern coast of India, bordering the Bay of Bengal.
- It stretches from Tamil Nadu in the south to West Bengal in the north.
- The eastern coastal plain is characterized by its flat and fertile terrain, which makes it ideal for agriculture.
- Important cities located in this region include Chennai, Visakhapatnam, and Kolkata.

The Western Coastal Plain:

- The western coastal plain is another narrow strip of land that runs along the western coast of India, bordering the Arabian Sea.
- It stretches from Gujarat in the north to Kerala in the south.
- The western coastal plain is also characterized by its flat and fertile terrain, similar to the eastern coastal plain.
- Important cities located in this region include Mumbai, Mangalore, and Kochi.

Meeting Point at Kanyakumari:

- Kanyakumari, also known as Cape Comorin, is a town located at the southernmost tip of the Indian peninsula.
- It is the point where the eastern coastal plain and the western coastal plain meet.
- At Kanyakumari, the Bay of Bengal, the Arabian Sea, and the Indian Ocean merge together, making it a significant geographical landmark.
- The meeting of the two coastal plains at Kanyakumari creates a unique and diverse landscape, with the sea on three sides.
- Kanyakumari is known for its beautiful beaches, stunning sunrises and sunsets, and its famous Vivekananda Rock Memorial.

In conclusion, Kanyakumari is the correct answer as it is the point where the eastern coastal plain and the western coastal plain meet at the southernmost tip of the Indian peninsula.