The correct answer is Faridabad.
Faridabad is a district in the Indian state of Haryana. It is located in the National Capital Region (NCR) of India. The district has a population of over 2.5 million people, making it the most populous district in Haryana. The population density of Faridabad is over 2,000 people per square kilometer, making it one of the most densely populated districts in India.
The main reason for the high population density of Faridabad is its proximity to Delhi. Faridabad is a major industrial and commercial center, and it is home to a large number of factories and businesses. The district is also a major transportation hub, and it is connected to Delhi by a number of highways and railways.
The high population density of Faridabad has a number of implications for the district. The district faces a number of challenges, such as traffic congestion, air pollution, and water scarcity. The district also faces a number of social challenges, such as poverty, unemployment, and crime.
The government of Haryana has taken a number of steps to address the challenges faced by Faridabad. The government has invested in infrastructure development, such as roads, bridges, and flyovers. The government has also invested in education and healthcare. The government has also taken steps to improve the environment, such as planting trees and cleaning up the Yamuna River.
The government of Haryana is committed to making Faridabad a better place to live. The government is working to address the challenges faced by the district, and it is working to improve the quality of life for the people of Faridabad.
The other options are incorrect because they do not have the highest population density in Haryana. Panipat has a population density of about 1,200 people per square kilometer. Panchkula has a population density of about 1,000 people per square kilometer. Rohtak has a population density of about 800 people per square kilometer.