The correct option is B Ashoka
Ashoka was the emperor of the Mauryan Dynasty who ruled from 265 to 238 BCE. His administrative policies promoted non-violence and tolerance. He was also a patron to Buddhism and promoted the teachings of Buddha. During his reign, he built pillars out of single stones and adorned them with religious teachings. Ashoka had many pillars built all around his empire. Pillars found at Meerut, Ambala, Allahabad, Loriya near Nandangadh, Sanchi, Kashi, Patna, Sarnath and Bodhivruksha are examples.