The correct answer is: A. Pt. Bastiram.
Pt. Bastiram was the first person to own a stud farm as a veterinarian. He was born in 1884 in the village of Jhajjar, Haryana, India. He studied veterinary medicine at the Punjab Veterinary College in Lahore, and after graduating in 1906, he worked as a veterinarian in the Indian Army. In 1919, he returned to his home village and established a stud farm. He was a pioneer in the field of veterinary medicine, and he is credited with developing new methods of breeding and raising horses. He was also a social reformer, and he worked to improve the lives of the people in his community. He died in 1962.
Option B, Karna Singh, was a prince of the princely state of Bikaner. He was born in 1911 and died in 1991. He was a keen horseman and breeder, and he owned a number of stud farms. However, he was not the first person to own a stud farm as a veterinarian.
Option C, Jagdish Prasad Chaudhary, was a politician and social worker. He was born in 1921 and died in 2001. He was a member of the Indian National Congress, and he served as a minister in the government of Haryana. He was also a founder of the All India Kisan Sabha, a farmers’ union. However, he was not the first person to own a stud farm as a veterinarian.
Option D, Raj Indra Singh, was a military officer and politician. He was born in 1923 and died in 2006. He served in the Indian Army during World War II, and after the war he joined the Indian National Congress. He served as a minister in the government of Haryana, and he was also a member of the Rajya Sabha, the upper house of the Indian Parliament. However, he was not the first person to own a stud farm as a veterinarian.