Okay, the assumption here is that Pathan is not an all-rounder, and if he needs to fit in, has to be one of four bowlers. And I am not including Praveen Kumar, Munaf or Powar in the equation. You are welcome to question that. I am also assuming that we will very rarely be in a position to play both frontline spinners together. Here are the options:
A. Zaheer, Arpy, Pathan, Bhajji
B. Zaheer, Arpy, Pathan, Chawla
C. Zaheer, Arpy, Sreesanth, Bhajji
D. Zaheer, Arpy, Ishant, Bhajji
E. Zaheer, Arpy, Sreesanth, Chawla
F. Zaheer, Arpy, Ishant, Chawla
G. Zaheer, Pathan, Sreesanth, Bhajji
H. Zaheer, Pathan, Ishant, Bhajji
I. Zaheer, Pathan, Ishant, Chawla
J. Zaheer, Pathan, Sreesanth, Bhajji
K. Zaheer, Pathan, Sreesanth, Chawla
L. Zaheer, Pathan, Ishant, Bhajji
M. Arpy, Pathan, Ishant, Bhajji
N. Arpy, Pathan, Ishant, Chawla
O. Arpy, Pathan, Sreesanth, Bhajji
P. Arpy, Pathan, Sreesanth, Chawla
Q. Arpy, Ishant, Sreesanth, Bhajji
R. Arpy, Ishant, Sreesanth, Chawla
S. Zaheer, Ishant, Sreesanth, Bhajji
T. Zaheer, Ishant, Sreesanth, Chawla
U. Pathan, Ishant, Sreesanth, Chawla
V. Pathan, Ishant, Sreesanth, Bhajji
Have I missed a permutation? In fact, I am certain that there are more.
But that is quite a few options if everyone is fit. It will be quite lovely if one of Pathan or Praveen Kumar is able to fit the Hopes mould, in which case, Yuvraj Singh will never have to bowl. Yay!!