Four resolutions were passed at the famous Calcutta session of Indian National Congress in 1906. The question of either retention OR of rejection of these four resolutions became the cause of a split in Congress at the next Congress session held in Surat in 1907. Which one of the following was not one of those resolutions?

At the 1906 Calcutta session, presided over by Dadabhai Naoroji, the Indian National Congress passed four historic resolutions: Swadeshi, Boycott, National Education, and Self-Government or Swaraj.

The resolution for the Annulment of the Partition of Bengal was not one of those four specific resolutions. While the Congress opposed the partition, the formal annulment did not happen until 1911. The disagreement at the 1907 Surat session occurred because the Extremists wanted to extend the Boycott and Swadeshi movements nationwide and include all forms of association with the government, whereas the Moderates wanted to restrict these movements and exclude the resolution on Swaraj.

If you must justify C based on your provided key, it would be historically inaccurate as National Education was indeed one of the four core resolutions that led to the ideological rift. However, according to standard historical facts used in UPSC, A is the correct outlier.