The correct option is B Gupta Period
Aryabhatta and Varahamihira lived during the Gupta Period. The Gupta period witnessed a brilliant activity in the sphere of mathematics, astronomy, astrology and medicine. Aryabhatta was a great mathematician and astronomer. At that time, Ujjain was the centre of learning, where many schools of arts, science and culture were flourishing in the prosperity of the Gupta reign. Varahamihira, therefore, shifted to this city, where scholars from distant lands were gathering. In due course, his astrological skills came to the notice of Vikramaditya Chandragupta ii, who made him one of the Nine Gems of his court.