The correct answer is: A) Kodagu
Kodagu is a district in the Indian state of Karnataka. It is located in the Western Ghats and is known for its coffee plantations, hills, and forests. The district has a population of 597,000 and a population density of 119 people per square kilometer.
Bengaluru Urban is the capital of Karnataka and is the most populous district in the state. It has a population of 10,753,000 and a population density of 3,124 people per square kilometer.
Chamarajanagara is a district in the southern part of Karnataka. It is known for its temples, hills, and forests. The district has a population of 762,000 and a population density of 207 people per square kilometer.
Uttara Kannada is a district in the northern part of Karnataka. It is known for its beaches, hills, and forests. The district has a population of 1,149,000 and a population density of 232 people per square kilometer.
Kodagu has the lowest population density in Karnataka because it is a hilly district with a large area of forest cover. The district is also home to a number of tribal communities, who live in small villages and have a low population density.