Correct Answer: (d) 4, 2, 1, 5, 3 and 6
Solution:After accepting the Buddhist religion, Ashoka stopped hunting and started pilgrimage trips. He went to Bodhgaya after 10 years of his coronation and Lumbini after 20 years. Historian Vincent Arthur Smith has placed dhamma voyage (Dhamma yatra) in Ashoka with upgupta in his book 'Ashoka : the Buddhist Emperor of India' based on historical facts in the following order - Lumbini, Kapilvastu, Bodhgaya, Sarnath, Kushinagar, Shravasti.