Two vertices of a triangle having coordinates $(8,7)$ and $(9,4)$ and the centroid is at the origin, then the coordinates of the third vertex is ________

Question

$\begin{array}{1 1}(A) \;(1,11) \\(B)\;(-1,11) \\(C)\;(-1,-11) \\(D)\;(1,-11) \end{array}$