I ran the following code and got the following huge space when using \pmod function. It is looking odd in the paper. Could anyone suggest how to reduce space? Thanks a lot for the kind help.

```
\begin{eqnarray*}
MSC(C_n^2) &=& \begin{cases}
1, & \text{if $n$ is odd and d is even ($n\equiv 1\pmod{4}$)},\\
2, & \mbox{if n is even and d is even ($n\equiv 0\pmod {4}$)},\\
3, & \mbox{if n is odd and d is odd ($n\equiv 3\pmod {4}$)},\\
3, & \mbox{if n is even and d is odd ($n\equiv 2\pmod {4}$)}.
\end{cases}
\end{eqnarray*}
```

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