$$\begin{gathered} \text{If a positive integer n is divisible by 9 , then the sum of the digits of n is divisible by 9 . } \\ \text{So which statement is it contrapositive.} \end{gathered}$$

$\text{ sum of digits of }n\text{ is divisible by 9}$$\text{ (n is divisible by }9\text{ ) }$

$\text{ (sum of digits of }\mathrm{n}\text{ is not divisible by 9)}$$\Rightarrow \left(\mathrm{n}\text{ is not divisible by }9\right)$

$\text{ (sum of digits of }n\text{ is divisible by 9)}$$\Rightarrow (\mathrm{n}\text{ is divisible by }9\text{ ) }$

None of these