The correct answer is A) Nizamabad.
Nizamabad is a district in the Indian state of Telangana. It is located in the northern part of the state and has a population of 3,239,707. The district has a population density of 224 people per square kilometer, which is the lowest in Telangana.
The other options are incorrect because they have a higher population density than Nizamabad. Adilabad has a population density of 280 people per square kilometer, Mahabubnagar has a population density of 310 people per square kilometer, and Medak has a population density of 330 people per square kilometer.
The population density of a district is the number of people living in that district per square kilometer. It is a measure of how crowded a district is. A district with a high population density is likely to have more urban areas and less agricultural land. A district with a low population density is likely to have more rural areas and more agricultural land.
The population density of a district can be affected by a number of factors, including the climate, the availability of water, the type of land, and the economic development of the district.