Option c is the correct answer. The Gupta Empire is considered as the Golden Age of India because of the remarkable achievements that were made in the fields of mathematics, astronomy, science, religion, and philosophy during this period. The Gupta Empire lasted from 320 CE to 550 CE and covered much of the Indian subcontinent. Some of the famous scholars who contributed to the Golden Age of India were Aryabhata, Kalidasa, Varahamihira, and Vishnu Sharma.