As per the Economic Survey 2018-19, what is the total length of National Highways in Bihar?

5,030.6 km
3,712 km
3,918 km
4,018 km

The correct answer is: C. 3,918 km

The Economic Survey 2018-19 states that the total length of National Highways in Bihar is 3,918 km. This includes both National Highways that are under construction and those that are already operational.

Option A is incorrect because it is the total length of National Highways in India. Option B is incorrect because it is the total length of National Highways in Uttar Pradesh. Option D is incorrect because it is the total length of National Highways in Madhya Pradesh.