Option c is the correct answer. The Sompura Mahavihar was built by Dharmapala. This 8th-century Buddhist monastery is located in Paharpur, near Rajshahi in northwestern Bangladesh. It covers around 27 acres of land and is one of the largest monasteries south of the Himalayas. It served as a significant intellectual center occupied by Buddhists, Jains, and Hindus. Despite the challenges of history, it survived and was recognized for its cultural value, eventually becoming a UNESCO World Heritage site in 1985. Important Tips Dharmapala (c. 770-810 CE), Pala king: Initially faced defeats from Pratiharas and Rashtrakutas but later expanded Pala empire in northern India. Bengal and Bihar under direct rule; sovereignty recognized by rulers in west, south India, Tibet. Defeated by Pratihara king Nagabhatta II near Monghyr. Founded Vikramshila monastery, attracted students from India, Tibet, translated texts to Tibetan. Established Somapuri monastery, granted 200 villages to Nalanda University. Scholar Santarakshita under his reign united Nagarjuna's Madhyamaka, Asanga's Yogacara, Dharmakirti's thought. Introduced Buddhism, Sarvastivadin monastic ordination to Tibet. Shantarakshita established the Samye monastery in Tibet, which became the center of Tibetan Buddhism.