The major portion of the West Bengal plateau lies in the district of:

Correct answer: Purulia

Explanation: The correct answer is C. Purulia. The West Bengal Plateau forms the eastern extension of the Chotonagpur Plateau and is mainly composed of hard crystalline rocks, lateritic soils, and undulating terrain. Among all the districts, Purulia occupies the largest portion of this plateau region, and is often referred to as the ‘Gateway to the Chotonagpur Plateau.’ The landscape is rugged and uneven, unlike the flat Gangetic plains in eastern districts. Other districts like Medinipur and Bankura also share portions of the plateau but not as extensively as Purulia.