The correct answer is: A) Sanchi Stupa.
The Mauryan Empire was an ancient Indian empire that ruled over much of the Indian subcontinent from the 4th to the 2nd century BCE. The empire was founded by Chandragupta Maurya, who united the Indian subcontinent under his rule. The Mauryan Empire was a major power in the ancient world, and its influence extended to Central Asia and Southeast Asia.
The Mauryan Empire left behind a number of important legacies, including the Sanchi Stupa. The Sanchi Stupa is a Buddhist monument located in Sanchi, Madhya Pradesh, India. The stupa was built in the 3rd century BCE by Ashoka the Great, the third Mauryan emperor. The Sanchi Stupa is one of the most important Buddhist monuments in the world, and it is a UNESCO World Heritage Site.
The other options are also important historical sites in Madhya Pradesh, but they were not built by the Mauryan Empire. Khajuraho Temples are a group of Hindu and Jain temples located in Khajuraho, Madhya Pradesh, India. The temples were built in the 11th and 12th centuries CE by the Chandela dynasty. Gwalior Fort is a fort located in Gwalior, Madhya Pradesh, India. The fort was built in the 7th century CE by the Tomara dynasty. Orchha Palaces are a group of palaces located in Orchha, Madhya Pradesh, India. The palaces were built in the 16th and 17th centuries CE by the Bundela dynasty.