The correct answer is (b) 7516.6 Km.
India has a coastline of 7,516.6 kilometers (4,671 mi), which is the seventh longest in the world. The coastline of India is bordered by the Arabian Sea to the west, the Bay of Bengal to the east, and the Indian Ocean to the south. The coastline of India is a major tourist attraction, and is home to a number of popular beaches, including Juhu Beach in Mumbai, Varkala Beach in Kerala, and Gokarna Beach in Karnataka.
The coastline of India is also home to a number of important ports, including Mumbai Port, Chennai Port, and Kolkata Port. These ports are vital to the Indian economy, and handle a significant amount of cargo traffic.
The coastline of India is a beautiful and important part of the country. It is a major tourist attraction, and is home to a number of important ports. The coastline of India is also a vital part of the Indian economy.