The hottest city in Jharkhand is Dhanbad. It is located in the eastern part of the state and has a population of over 4 million people. The average temperature in Dhanbad is 27 degrees Celsius, but it can reach up to 40 degrees Celsius during the summer months. The city is known for its coal mines and is one of the most polluted cities in India.
Ranchi is the capital of Jharkhand and is located in the central part of the state. It has a population of over 1 million people and is a major educational and cultural center. The average temperature in Ranchi is 25 degrees Celsius, but it can reach up to 35 degrees Celsius during the summer months.
Jamshedpur is a city in the eastern part of Jharkhand. It is known for its steel industry and has a population of over 2 million people. The average temperature in Jamshedpur is 26 degrees Celsius, but it can reach up to 38 degrees Celsius during the summer months.
Bokaro is a city in the eastern part of Jharkhand. It is known for its steel industry and has a population of over 1 million people. The average temperature in Bokaro is 27 degrees Celsius, but it can reach up to 39 degrees Celsius during the summer months.
Therefore, the correct answer is Dhanbad.