The Partition of Bengal made by Lord Curzon in 1905 lasted until

a

the Partition of India, in 1947 when East Bengal became East Pakistan

b

Gandhiji launched his Civil Disobedience Movement

c

King George V abrogated Curzon's Act at the Royal Darbar in Delhi in 1911

d

the First World War when Indian troops were needed by the British and the partition was ended.