The popular beach destination Kovalam is in:

Thiruvananthapuram
Kollam
Alappuzha
Ernakulam

The correct answer is A) Thiruvananthapuram.

Kovalam is a town in Thiruvananthapuram district in the Indian state of Kerala. It is a popular beach destination, known for its white sand beaches and clear waters. The town is located about 16 kilometers from Thiruvananthapuram city.

The other options are incorrect. Kollam is a city in Kerala, located about 60 kilometers from Thiruvananthapuram. Alappuzha is a district in Kerala, located about 100 kilometers from Thiruvananthapuram. Ernakulam is a district in Kerala, located about 120 kilometers from Thiruvananthapuram.