Which of the following is not a part of Eastern Division of Haryana?

The correct answer is D. Sonipat.

The Eastern Division of Haryana is one of the three divisions of the Indian state of Haryana. It comprises the districts of Faridabad, Gurgaon, Jhajjar, Karnal, Panipat, Rohtak, Sonipat, and Yamunanagar.

Sonipat is a city in the Indian state of Haryana. It is the headquarters of Sonipat district and is located in the National Capital Region (NCR). Sonipat is one of the oldest cities in India and is mentioned in the Mahabharata. The city is also known for its historical monuments, including the Qutub Minar and the Atala Masjid.

The other options are all districts in the Eastern Division of Haryana.