Who of the following were elected to collaborate with Mahatma Gandhi who was to author the new Constitution of the Congress as the per resolution of Indian National Congress at Amritsar Session, 1919 ?

1. B.G. Tilak       2. N.C. Kelkar

3. C.R. Das        4. I.B. Sen

Select the correct answer from the code given below:

Code :

U.P.P.C.S. (Mains) 2014