The correct answer is (a) D. K. Chakravarti.
D. K. Chakravarti was an Indian historian and archaeologist who specialized in the study of ancient India. He was born in 1920 in Kolkata, India, and died in 2004 in New Delhi, India. He was a professor of history at the University of Calcutta and the University of Delhi. He was also the director of the Indian Institute of Advanced Study in Shimla.
Chakravarti’s most famous work is “The Roots of Ancient India”. This book was published in 1973 and is a comprehensive study of the history of ancient India. It covers the period from the Indus Valley Civilization to the Gupta Empire.
The other options are incorrect.
(b) D. P. Agrawal was an Indian archaeologist who specialized in the study of the Indus Valley Civilization. He was born in 1920 in Allahabad, India, and died in 1995 in New Delhi, India. He was a professor of archaeology at the University of Allahabad.
(c) W. A. Fairservis was an American archaeologist who specialized in the study of South Asia. He was born in 1921 in New York City, New York, and died in 1994 in Washington, D.C. He was a professor of anthropology at the American University in Washington, D.C.
(d) A. Ghosh was an Indian archaeologist who specialized in the study of the Gupta Empire. He was born in 1909 in Kolkata, India, and died in 1991 in New Delhi, India. He was a director-general of the Archaeological Survey of India.