The correct answer is (a) Harikrishna Raturi.
Harikrishna Raturi was a Garhwali writer, historian, and social reformer. He is best known for his book ‘Garhwal – Ancient and Modern’, which is a comprehensive history of the Garhwal region. The book was published in 1936 and is considered to be a classic work of Garhwali literature.
Raturi was born in 1887 in the village of Raturi in the Garhwal region of Uttarakhand, India. He was educated at the Government High School in Srinagar, Garhwal, and then at the Muir Central College in Allahabad. After graduating from college, he worked as a teacher and then as a journalist.
Raturi was a prolific writer and wrote extensively on a variety of topics, including history, culture, religion, and social reform. He was also a strong advocate for the rights of the Garhwali people.
Raturi died in 1966 at the age of 79. He is remembered as a leading figure in the history of Garhwali literature and culture.
The other options are incorrect.
(b) Chandra Singh Garhwali was a Garhwali freedom fighter and poet. He is best known for his poem ‘Garhwali Geet’, which is an ode to the Garhwal region.
(c) William Sax is an American anthropologist who has written extensively on the Garhwal region. His most famous work is the book ‘Mountain Gods: The Garhwal Himalayas in the Hindu Imagination’.
(d) Pati Ram was a Garhwali writer and historian. He is best known for his book ‘Garhwal Ka Itihas’, which is a history of the Garhwal region.