The remains of a Mauryan hall with eighty polished sandstone pillars were excavated at which place in Patna?

The correct answer is A, Kumhrar. Excavations at Kumhrar in Patna uncovered the plinth and pillar stumps of a large pillared hall of the Mauryan period, counted at eighty pillars of Chunar sandstone with the characteristic mirror polish. The site is identified with the assembly or palace area of Pataliputra, and the Arogya Vihara, a monastery associated with the physician Dhanvantari, was also found there.

Option B, Didarganj, is where the life-size Yakshi holding a chauri, one of the finest examples of Mauryan polish, was recovered from the bank of the Ganga. Option C, Agam Kuan, is an ancient deep well near Patna linked in tradition with Ashoka. Option D, Bulandibagh, yielded the wooden palisade of the city wall of Pataliputra, which matches what Megasthenes wrote about timber fortifications. All four are Patna sites, which is what makes the question a good discriminator.