Moderates and the Extremists in the Indian National Congress split in 1907 at __?
[A] Surat
[B] Calcutta
[C] Nagpur
[D] Madras

The growing differences between the Moderates and the Extremists came at Surat Session 1907,when against the wishes of Extremists who preferred Lala Laj Pat rai to be the President ; Dr. Raj Bhirai Ghosh was elected as the Congress President.The Extremists left the Congress. After the surat Split, most of the extremist leaders including Lal,Bal,Pal were arrested and were given long term imprisonment.