Which among the following states is not covered by the Chhota Nagpur Plateau ?
[A]West Bengal

The Chhota Nagpur Plateau (also referred as Chhota Nagpur) is a plateau in Eastern India, which covers much of Jharkhand state as well as adjacent parts of Orissa, West Bengal, Bihar and Chhattisgarh. The total area of the Chhota Plateau is approximately 65000 square kilometers. The highest point of Chhota Nagpur plateau is Pareshnath Hill.