These rock engravings show cattle with humps. The humped cattle probably were the ancestors of the Sanga and Zebu cattle.
In the picture below you can see a mixture of Saharan cattle. Note the long horned Sanga type cattle at the top of the picture below:
These pictures date back to 7000 BC. The Dravidians probably took the Zebu cattle to India after they migrated from Nubia. The Dravidians founded the Indus Valley and South Indian Megalithic culture.
B.B. Lal proved conclusively that the Dravidians were genetically related to the C group of Nubia, given the fact that both groups used 1) a common black-and-red ware (BRW), 2) a common burial complex incorporating megaliths and circular rock enclosures and 3) a common type of rock cut sepulchre. The BRW industry diffused from Nubia, across West Asia into Rajastan, and thence to East Central and South India.
The rock art evidence of humped cattle suggest that the Zebu originated in Africa, not India.