The correct answer is: a) Pamban Island.
Pamban Island is an island in the Gulf of Mannar, off the coast of Tamil Nadu, India. It is connected to the mainland by the Pamban Bridge, also known as the Rama Setu. The island is home to the Rameswaram Temple, a Hindu temple dedicated to the god Rama. The temple is one of the most important pilgrimage sites in India.
Sriharikota is an island in the Bay of Bengal, off the coast of Andhra Pradesh, India. It is home to the Satish Dhawan Space Centre, the main launch site of the Indian Space Research Organisation (ISRO).
Katchatheevu is an island in the Gulf of Mannar, off the coast of Tamil Nadu, India. It is currently under the administration of Sri Lanka. The island is home to a Hindu temple and a lighthouse.
Elephanta Island is an island in the Arabian Sea, off the coast of Mumbai, Maharashtra, India. It is home to the Elephanta Caves, a UNESCO World Heritage Site. The caves are a complex of rock-cut temples dedicated to the Hindu god Shiva.