Correct Option (A):
Statement 1 is correct. The Asiatic lion (Panthera leo persica) is endemic to India, with its only wild population found in the Gir Forest National Park and Wildlife Sanctuary in Gujarat. It is classified as Endangered by the IUCN.
Incorrect Options:
Statement 2 is incorrect. The double-humped camel (Bactrian camel) is found in the cold desert region of Ladakh in India. However, its natural range extends across Central Asia, including Mongolia, China, Kazakhstan, and other countries. Thus, it is not exclusively found in India.
Statement 3 is incorrect. The greater one-horned rhinoceros (Rhinoceros unicornis) is native to the Indian subcontinent. While significant populations exist in India, particularly in Assam, it is also naturally found in Nepal. Therefore, it is not exclusive to India.
Based on the analysis, only statement 1 is correct. Hence, option (1) is the correct answer.