Option c is the correct answer. Ghositarama Monastery, situated in Kaushambi, a prominent Buddhist center during Buddha's era, hosted him during his visits. It was built by one of the leading Shreshti (bankers) of Kaushambi, Ghosita whose daughter Samavati was the wife of Udayana, the most famous king of the Vatsa kingdom who ruled in the 6th century BC. Situated in Kushinagar, about 1.5 km from Mahaparinirvana Temple, Ramabhar Stupa stands 15 meters tall. It signifies the cremation place of Lord Buddha and is known as 'MukutBandhan Chaitya' in Buddhist texts. Dhamek Stupa is a massive stupa located at the archaeological site of Sarnath in the state of Uttar Pradesh, India. Itmarks the precise location where the Buddha preached his first discourse to his first five disciples (Kaundinya, Assaji, Bhaddiya, Vappa and Mahanama), and where all five eventually became fully liberated. The ancient city of Sravasti, represented by SahethMaheth remains, holds historical significance in Uttar Pradesh. Linked to Buddha and Mahavira, it was a vital Buddhist pilgrimage site. Famous for Jetavana Monastery and philosophical debates, its ruins were rediscovered by Alexander Cunningham in 1863.