Option a is the correct answer. Sanchi, a distinguished Buddhist site in India, bore multiple ancient names including "Kaknam," "Kakanaya," "Kakanava," "Kakanadabota," and "Bota-Sriparvata. These names allude to the site's original identity before it evolved into a significant center for Buddhist architecture and pilgrimage during the Mauryan period, marked by the construction of the Great Stupa and other structures