The correct answer is: B. important bird sanctuary
Vedanthangal Bird Sanctuary is a bird sanctuary located in the Nagapattinam district of Tamil Nadu, India. It is one of the most important bird sanctuaries in India and is home to over 200 species of birds. The sanctuary is known for its migratory birds, which come to the sanctuary to breed and feed. The sanctuary is also home to a variety of other wildlife, including reptiles, mammals, and amphibians.
The other options are incorrect because they do not accurately describe the Vedanthangal Bird Sanctuary. Option A is incorrect because the sanctuary does not have reserves of wild ass, wolf, nilgai, or chinkara. Option C is incorrect because the sanctuary does not have reserves of pantha, chital, sloth bear, or wolf. Option D is incorrect because the sanctuary does not have reserves of elephant, deer, wild boar, crocodile, or crangetic dolphin.