Option b is the correct answer. Ikshvaku dynasty, also known as the Andhra Ikshvakus or Ikshvakus of Vijayapuri ruled in the Krishna River valley of India, with their capital at Vijayapuri (modern Nagarjunakonda), during the 3rd and 4th centuries CE. The Ikshvaku kings were Shaivites and performed Vedic rites, but Buddhism also flourished during their reign. The rulers of this dynasty have been referred to as 'Shriparvatiya' in the Matsya Purana. This is substantiated by the historical record of Vijayapuri's ruler, Ehuvala Chamtamula, which traces his lineage back to the renowned Ikshvaku dynasty.