The correct answer is: A. Northern
The northern part of Jammu records the maximum temperature in summer season. This is because the northern part of Jammu is located in the Pir Panjal Range, which is a mountain range that blocks the cold winds from the north. As a result, the northern part of Jammu is warmer than the southern part of Jammu.
The southern part of Jammu is located in the plains, which are not as warm as the mountains. The eastern part of Jammu is also located in the plains, but it is closer to the Himalayas than the southern part of Jammu. As a result, the eastern part of Jammu is slightly warmer than the southern part of Jammu.
The western part of Jammu is located in the Pir Panjal Range, but it is not as high as the northern part of Jammu. As a result, the western part of Jammu is not as warm as the northern part of Jammu.
In conclusion, the northern part of Jammu records the maximum temperature in summer season. This is because the northern part of Jammu is located in the Pir Panjal Range, which is a mountain range that blocks the cold winds from the north. As a result, the northern part of Jammu is warmer than the southern part of Jammu.