Which Buddhist stupa complex in Madhya Pradesh, originally commissioned by Emperor Ashoka in the 3rd century BCE and shown in this image, features four ornate carved toranas and is a UNESCO World Heritage Site?

• A Amaravati Stupa
• B Dhamek Stupa
• C Kesaria Stupa
• D Sanchi Stupa ✓

The Great Stupa at Sanchi, commissioned by Ashoka, is one of the oldest stone structures in India, with its elaborately carved gateways added in the 1st century BCE.