The correct answer is: C. 1600 KM.
The Gujarat coastline is 1600 kilometers long. It is the longest coastline of any state in India. The coastline is a major tourist attraction, and is home to many beaches, temples, and other historical sites.
Option A is incorrect because the Gujarat coastline is 1600 kilometers long, not 1400 kilometers.
Option B is incorrect because the Gujarat coastline is 1600 kilometers long, not 1500 kilometers.
Option D is incorrect because the Gujarat coastline is 1600 kilometers long, not 1700 kilometers.