The correct answer is: A. Northern part
Haryana is a state in northern India. It is bordered by Punjab to the west, Himachal Pradesh to the north, Uttarakhand to the northeast, Uttar Pradesh to the east, Rajasthan to the south, and Delhi to the southeast. The state has a population of over 28 million people and is the 17th most populous state in India.
The northern part of Haryana is the hottest part of the state. The average temperature in the northern part of Haryana is around 30 degrees Celsius. The southern part of Haryana is cooler than the northern part. The average temperature in the southern part of Haryana is around 25 degrees Celsius. The south-western part of Haryana is also cooler than the northern part. The average temperature in the south-western part of Haryana is around 27 degrees Celsius. The eastern part of Haryana is the coolest part of the state. The average temperature in the eastern part of Haryana is around 23 degrees Celsius.
The northern part of Haryana is hotter than the southern part, south-western part, and eastern part because it is closer to the Himalayas. The Himalayas are a mountain range that blocks the cold air from the north from reaching the northern part of Haryana. This makes the northern part of Haryana warmer than the other parts of the state.