Hint:The coast or coastline is the line where the land meets any waterbody like sea or ocean. India has a vast coastline at different states and union territories. India’s coastline amounts to 7516 km among which 5422 km amounts to the mainland coastline whereas 2094 km amounts to island coastline. We will see which state has the longest coastline in the complete answer below.
Complete answer: Let us discuss each option individually in detail to figure out the correct answer with the help of the above stated hint. Tamil Nadu:- Tamil Nadu has the third longest coastline in India which is also known as the coromandel coast. It is not the longest though. Therefore, this is not the correct option. Andhra Pradesh:- The Andhra Pradesh coastline is the second longest in the country. The coastline of Andhra Pradesh amounts to 974 km. Therefore, this is not the correct option. Goa:- Goa being the smallest state of India has a coastline of only 160 km long. It is home to many beautiful beaches but not the longest coastline of the country. Therefore, this is not the correct option. Gujarat- Gujarat has the longest coastline in India along its kathiawar region. The length of the Gujarat coastline is about 1600 km surrounded by the Arabian sea. Therefore, this is the correct option.
Hence, the correct answer is option D.
Note: The Indian coastline touches nine states Gujarat, Maharashtra, Goa, Tamil Nadu, Kerala, Karnataka, Andhra Pradesh, Orissa, West Bengal and two union territories Puducherry and Daman and Diu. The Island territories of the Indian coastline are Lakshadweep and Andaman and Nicobar islands in the Arabian sea.