Who among the following resigned from the Viceroy's Executive Council, saddened by the Jallianwala Bagh Massacre?
1. Chettur Sankaran Nair
2. Ishwari Prasad
3. Muhammad Shafi
4. Iqbal Narain Gurtu
Select the correct answer from the code given below:

1. A.Only 1
2. B.3 and 4
3. C.Only 4
4. D.2 and 3