The correct answer is C. Kumhrar.
Kumrahr is an archaeological site in Patna, India. It is located on the banks of the Son River, about 10 kilometers from the city center. The site was first excavated in the early 20th century, and it has yielded important evidence of the Mauryan period.
The Mauryan Empire was one of the largest and most powerful empires in Indian history. It was founded by Chandragupta Maurya in the 4th century BCE, and it reached its peak under the reign of Ashoka the Great in the 3rd century BCE. The Mauryan Empire was a major center of art, architecture, and learning.
The archaeological site at Kumhrar is located on the site of the ancient city of Pataliputra, which was the capital of the Mauryan Empire. The site has yielded a number of important artifacts, including coins, pottery, and sculptures. The most famous artifact from Kumhrar is the Ashoka Pillar, which is a stone pillar that was erected by Ashoka the Great. The Ashoka Pillar is inscribed with edicts from Ashoka, which provide valuable information about the Mauryan Empire.
The archaeological site at Kumhrar is an important source of information about the Mauryan period. The site has yielded a number of important artifacts, which provide valuable information about the history and culture of the Mauryan Empire.
The other options are incorrect because they are not archaeological sites that have yielded important evidence of the Mauryan period. Sasaram is a city in Bihar, India. Rajgir is a city in Bihar, India. Champa is a city in Vietnam.