As per India State of Forest Report, 2017, which of the following districts has the least forest cover?

The correct answer is A. Siwan.

As per India State of Forest Report, 2017, the forest cover of Siwan district is 1.18%, which is the least among all the districts of Bihar. The forest cover of Buxar district is 2.15%, the forest cover of Jehanabad district is 2.22%, and the forest cover of Saran district is 2.34%.

The forest cover of a district is the percentage of the total area of the district that is covered by forests. Forests are important for a number of reasons, including providing habitat for wildlife, regulating the climate, and preventing soil erosion.