Hint: India is one of the most populated countries of the world with more than 16 percent of the world population living here. It is also the seventh-largest country in the world.
Complete Answer: Geographically India is located in the south-central part of Asia. Its peninsular has protruded to the Indian ocean for about 1600 kilometre. It stretches on all sides encompassing the vast expanse of the North Plains, the thirsty sands of Thar on the west, the intricate maze of Assam Hills and vales on the east, the uneven plateau surface, the ancient hills and the coconut and spices bearing coastal plains on the south and the lofty snow capped mountains on the north.
For administrative convenience, India has been divided into 28 states and 8 union territories. The coastline of the mainland of India is 6100 kilometres in length while the coastline of the Indian unions accounts for 7517 kilometres.
Thus, the correct answer is option (D).
Note: Land frontiers of India are formed by Pakistan, Afghanistan, China, Nepal, Bhutan, Bangladesh and Myanmar. These land frontiers are 15200 kilometres long.