The correct answer is: A. Dr. H. R. Gupta.
Dr. H. R. Gupta was an Indian historian and archaeologist who specialized in the history of Haryana. He was the author of several books on the subject, including “Haryana: A Historical and Cultural Study” and “The History of Haryana.” In his book “Haryana: A Historical and Cultural Study,” Dr. Gupta states that the word “Haryana” is derived from the Sanskrit word “Arya,” which means “noble.” He argues that the name “Haryana” was given to the region by the Aryans, who were the first inhabitants of the area.
The other options are incorrect.
Option B, Pt. Rahul Sankrityayan, was an Indian historian, linguist, and writer. He is best known for his work on the history of India and his translations of Buddhist texts. However, he did not write anything about the origin of the word “Haryana.”
Option C, Satish Dwiwedi, is an Indian politician who is currently the Minister of State for Parliamentary Affairs in the Government of India. He is not an expert on the history of Haryana and has not written anything about the origin of the word “Haryana.”
Option D, Chahmana, was a Rajput clan that ruled over parts of Haryana in the medieval period. However, there is no evidence that they were the ones who gave the region its name.