The correct answer is C. Nicholas Roerich.
Nicholas Roerich was a Russian painter, writer, and philosopher who lived from 1874 to 1947. He is best known for his paintings of the Himalayas, which he visited several times in the early 20th century. His book “Himalayas: The Abode of Light” was published in 1929 and is a collection of his paintings and writings about the region.
Option A, U. S. Parmar, is a contemporary Indian writer who has written several books on the Himalayas. Option B, Lalchand Prarthi, is a Hindi poet who has also written about the Himalayas. Option D, A. P. F. Harcourt, was a British colonial administrator who served in India in the late 19th and early 20th centuries. He wrote several books about India, but none of them are about the Himalayas.