If $n$ is odd and ${ }^n{C}_0{<}^n{C}_1{<}^n{C}_2<\dots {<}^n{C}_r$, then maximum possible value of $r$ is

• A

  $\frac{n-1}{2}$

• B

  $\frac{n+1}{2}$

• C

  $n$

• D

  none of these