The correct answer is (b), Greater Noida to Agra.
The Yamuna Expressway is a 165-kilometre-long (90 mi) controlled-access highway in India that connects Greater Noida in the National Capital Region (NCR) to Agra, the city of Taj Mahal. It is the longest expressway in India and was completed in 2001. The expressway is a six-lane highway with a speed limit of 100 kilometres per hour (62 mph). It is a toll road and the toll is payable at the entry and exit points.
The Yamuna Expressway is a major transportation corridor that connects the NCR to Agra. It is used by a large number of commuters and tourists every day. The expressway has helped to reduce travel time between Greater Noida and Agra from about four hours to about two hours. It has also helped to boost economic activity in the region.
The Yamuna Expressway is a well-maintained and well-lit highway. It is a safe and convenient way to travel between Greater Noida and Agra. The expressway is a popular choice for commuters, tourists, and businesses.
The other options are incorrect because they do not represent the correct route of the Yamuna Expressway. Option (a), Noida to Greater Noida, is the wrong route because the Yamuna Expressway does not pass through Noida. Option (c), Lucknow to Agra, is the wrong route because the Yamuna Expressway does not pass through Lucknow. Option (d), Agra to Allahabad, is the wrong route because the Yamuna Expressway does not pass through Allahabad.