The correct answer is: A. Pt. Radhakrishna Shastri.
Khandkavya Sankhya Sudhakar is a book on the history of Indian literature. It was written by Pt. Radhakrishna Shastri in 1933. The book is divided into two parts. The first part deals with the history of Indian literature from the Vedic period to the 12th century. The second part deals with the history of Indian literature from the 13th century to the 19th century.
Pt. Radhakrishna Shastri was a well-known scholar of Indian literature. He was born in 1877 in the village of Bhojpur in the state of Uttar Pradesh, India. He studied Sanskrit and Hindi at the University of Allahabad. After graduating, he taught Sanskrit at the University of Allahabad for many years. He also served as the director of the Oriental Research Institute in Mysore.
Pt. Radhakrishna Shastri was a prolific writer. He wrote several books on Indian literature, including Khandkavya Sankhya Sudhakar, Bharatiya Kavya Ka Itihas, and Bharatiya Sahitya Ka Itihas. He also wrote several books on Sanskrit grammar, including Vyakarana Kaustubha and Vyakarana Ratnakara.
Pt. Radhakrishna Shastri was a great scholar of Indian literature. His books are still considered to be authoritative works on the subject. He was a pioneer in the field of Indian literary studies. His work has helped to promote the study of Indian literature in India and abroad.
The other options are incorrect.
Option B: Vanmalidas Shastri was a poet and scholar who lived in the 16th century. He is best known for his work on the Mahabharata.
Option C: Hansraj Nagar was a writer and journalist who lived in the 20th century. He is best known for his work on the history of India.
Option D: Pt. Hazari Lal Shastri was a politician and scholar who lived in the 20th century. He is best known for his work on the history of Hinduism.