The correct answer is option B: Delhi – Agra.
Dharuhera industrial area is located on National Highway 48, which is also known as the Delhi-Agra Expressway. The expressway is a six-lane highway that connects Delhi to Agra. It is one of the busiest highways in India and is a major transportation corridor for goods and people.
The other options are incorrect because they do not correspond to the location of Dharuhera industrial area. Option A: Delhi – Rohtak is a national highway that connects Delhi to Rohtak. Option C: Delhi – Jaipur is a national highway that connects Delhi to Jaipur. Option D: Delhi – Ambala is a national highway that connects Delhi to Ambala.