The correct option is B Western Bengal, Bihar, Odisha & Eastern Bengal, Assam
Partition of Bengal carried out by the British viceroy in India, Lord Curzon, despite strong Indian nationalist opposition. It divided Bengal into Hindu dominated west which consisted of Bihar, Odisha, etc. and Muslim dominated East Bengal with Assam. There was a great protest by the Hindus and Muslims of Bengal against it and the plan had to be abandoned.