The correct answer is: B. NH 33
NH 33 is the longest national highway in Jharkhand. It is a 1,059-km-long highway that runs from Varanasi in Uttar Pradesh to Ranchi in Jharkhand. The highway is a part of the Golden Quadrilateral, a network of national highways that connects the four major metropolitan cities of India: Delhi, Mumbai, Chennai, and Kolkata.
NH 33 is a four-lane highway for most of its length. It is a major artery for transportation in Jharkhand and connects the state with the rest of India. The highway is also a major tourist destination, as it passes through some of the most scenic areas of Jharkhand.
The other options are incorrect because they are not the longest national highways in Jharkhand. NH 20 is a 1,200-km-long highway that runs from Agra in Uttar Pradesh to Silchar in Assam. NH 133B is a 200-km-long highway that runs from Ranchi to Jamshedpur. NH 133A is a 100-km-long highway that runs from Ranchi to Daltonganj.