Navsari district was formed in 1997. It is one of the 33 districts of Gujarat state in western India. The district is headquartered at Navsari city. It is bordered by Valsad district to the north, Surat district to the east, Dang district to the south, and the Arabian Sea to the west. The district has a population of over 2.5 million people. The main language spoken in the district is Gujarati. The district is known for its production of cotton, sugar cane, and rice. It is also home to a number of important historical and religious sites, including the Navsari Jain Temple and the Navsari Mosque.
Option A: 2007 is incorrect. Navsari district was formed in 1997, not 2007.
Option B: 1987 is incorrect. Navsari district was formed in 1997, not 1987.
Option C: 1997 is correct. Navsari district was formed in 1997.
Option D: 1999 is incorrect. Navsari district was formed in 1997, not 1999.