If \(\rm \begin{pmatrix} 15\\ 8\end{pmatrix}+\begin{pmatrix} 15\\ 7\end{pmatrix}=\begin{pmatrix} \rm n\\ \rm r\end{pmatrix}\), then the values of n and r are:Where, \(\begin{pmatrix} \rm n\\ \rm r\end{pmatrix} \)= nCr

• A. 16 and 7.
• B. 16 and 8.
• C. 16 and 9.
• D. 30 and 15.