Correct option is C
The correct answer is (c) Andhra Pradesh.
· The Amaravati Stupa is an important Buddhist monument located in Andhra Pradesh, specifically in the town of Amaravati on the banks of the Krishna River.
· The stupa is one of the most significant historical and archaeological sites related to Buddhism in India.
· It is believed to have been constructed around the 3rd century BCE, during the reign of the Maurya Emperor Ashoka, who played a key role in spreading Buddhism throughout the Indian subcontinent.
Additional Information:
· Amaravati was an important center for Buddhism during the Kushana period, and it was known for its Buddhist monastic culture and artistic achievements.
· The stupa's remains, including fragments of its marble reliefs, can now be found in the Amaravati Archaeological Museum.

Other Options:
· Odisha: Odisha is famous for sites like Lalitgiri, Ratnagiri, and Udayagiri which also have significant Buddhist archaeological remains, but the Amaravati Stupa is in Andhra Pradesh.
· Madhya Pradesh: Madhya Pradesh has other ancient Buddhist sites like Sanchi.