The correct answer is: D. Jhajjar.
Mahatma Gandhi Thermal Power Project is situated in Jhajjar district of Haryana. It is a coal-fired power plant with an installed capacity of 2,100 MW. The plant was commissioned in 1991 and is owned and operated by NTPC Limited.
Panipat is a district in Haryana. It is located in the northern part of the state and is bordered by the districts of Sonipat, Karnal, Kurukshetra, and Yamunanagar. The district has a population of over 1.5 million people.
Gurugram is a district in Haryana. It is located in the southern part of the state and is bordered by the districts of Faridabad, Mewat, Rewari, and Palwal. The district has a population of over 3 million people.
Sonipat is a district in Haryana. It is located in the northern part of the state and is bordered by the districts of Panipat, Karnal, Kurukshetra, and Yamunanagar. The district has a population of over 1.2 million people.
Jhajjar is a district in Haryana. It is located in the southern part of the state and is bordered by the districts of Gurugram, Rewari, and Mahendragarh. The district has a population of over 1.1 million people.