If the area of a parallelogram whose diagonals coincide with the following pair of vectors is $5\sqrt{3}$, then vectors are
Answer & explanation
Correct answer: option 2
If $\vec a, \vec b$ are diagonals of a parallelogram, then its area is $\frac{1}{2}|\vec a×\vec b|$
Clearly, $\frac{1}{2}|\vec a×\vec b|=5\sqrt{3}$ is satisfied by the pair of vectors given in option (2).