The correct answer is: D) Kodagu.
Kodagu is a district in the Indian state of Karnataka. It is known for its concentration of megalithic dolmens, which are prehistoric stone structures. The dolmens are found in the hills and forests of Kodagu, and they are believed to have been built by the early inhabitants of the region. The dolmens are a popular tourist attraction, and they are also a valuable source of information about the history and culture of Kodagu.
Raichur is a district in the Indian state of Karnataka. It is not known for its concentration of megalithic dolmens.
Shimoga is a district in the Indian state of Karnataka. It is not known for its concentration of megalithic dolmens.
Chitradurga is a district in the Indian state of Karnataka. It is not known for its concentration of megalithic dolmens.
Megalithic dolmens are prehistoric stone structures that are found in many parts of the world. They are typically made up of a large stone slab that is supported by smaller stones. The dolmens are believed to have been used as tombs or as places of worship.
The dolmens in Kodagu are some of the most well-preserved in India. They are a popular tourist attraction, and they are also a valuable source of information about the history and culture of Kodagu.