The correct answer is: B. 219 km
The road density in Bihar is the length of roads per 100 square kilometers of area. As per Economic Survey 2018-19, the road density in Bihar is 219 km. This is lower than the national average of 501.5 km. The low road density in Bihar is a major obstacle to economic development. It makes it difficult for people and goods to move around, and it increases the cost of transportation. The government of Bihar is working to improve the road network in the state. It has launched several schemes to build new roads and to improve the condition of existing roads. These schemes are expected to help to increase the road density in Bihar and to improve the state’s economy.
Option A is incorrect. The road density in Bihar is not 190 km. It is 219 km.
Option C is incorrect. The road density in Bihar is not 501.5 km. It is 219 km.
Option D is incorrect. The road density in Bihar is not 333.5 km. It is 219 km.