Hello aspirant,

Yes this question is treated as very very important question. And if we see question paper of some previous year so we will find this question.

Parallelogram law of vector addition is very important anD useful law so this is the reason of asking this question in exams.

You should prepare well this question as well as all the laws of vector which is important for exams and also valuable I'm further studies.

This law States that "" If two vectors acting simultaneously at a point can be represented both in magnitude and direction by the adjacent sides of a parallelogram drawn from a point, then the resultant vector is represented both in magnitude and direction by the diagonal of the parallelogram passing through that point. ""

Hope this helps you

feel free to ask any questions

all the best for your future