Correct answer is (c) stupas
The explanation: A stupa (Sanskrit- “heap”) is a mound-like or hemispherical structure containing relics (śarīra – typically the remains of Buddhist monks or nuns) that is used as a place of meditation. A related architectural term is a chaitya, which is a prayer hall or temple containing a stupa.
In Buddhism circumambulation or pradakhshina has been an important ritual and devotional pracice since the earliest times, and stupas always have a pradakhshina path around them.
