Option b is the correct answer. Bulandi Bagh is located within the archaeological site of Pataliputra. This area gained significance due to the discovery of the monumental Pataliputra capital in 1895. It is believed that Bulandi Bagh was once part of the royal palace complex of the Maurya dynasty. Excavations have revealed wooden palisades, punch-marked coins, terracotta figures, and other artifacts that provide insights into the historical importance of the region during the Mauryan period.