Answer : 4. "बाड़मेर"
Explanation :

1. Barmer district of the state has the highest number of goats.

2. The goat is said to be the animal of the future.

3. Rajasthan ranks first in goat rearing in the country.

4. 13.99 per cent of all goats in India (148.88 million) are found in Rajasthan. And the number of goats in the total animal wealth of Rajasthan is 36.69 per cent.

5. Central Goat Research Center is situated in Avikanagar, Tonk.

6. Animal Breeding Farm, Kum located in Bharatpur district is the leading center of goat breed promotion in the state.