Trong mặt phẳng Oxy, cho (overrightarrow a  = left( {3; - 4} ight);overrightarrow b  = left( { - 1;2} ight)).

A. \(\overrightarrow v  = \left( {2; - 6} \right).\)

B. \(\overrightarrow v  = \left( {-4; - 6} \right).\)

C. \(\overrightarrow v  = \left( {4; - 6} \right).\)

D. \(\overrightarrow v  = \left( {4; - 2} \right).\)