Two consecutive sides of a parallelogram are $4x+5y=0$ and $7x+2y=0$. If the equation of one diagonal is $11x + 7y =9$, then the equation of the other diagonal is :

Question

( A ) none of these
( B ) $2x+y=0$
( C ) $x-y=0$
( D ) $x+2y=0$