Correct option is D
The correct answer is (d) Gaur
• The Gaur (Bos gaurus), also known as the Indian bison, is the closest wild relative of domestic cattle.
• They share a common ancestor with the aurochs and are genetically similar
• They share many physical and behavioral similarities, and there is even evidence of past hybridization between the two.
• Gaurs are found in several Indian national parks, including Nagarhole and Bandipur, where they are protected species.
• The Asiatic buffalo (also known as water buffalo) is a herbivore related to cattle.