IF no angle is mentioned in the below attached question, the answer would be d right ?
In the ideal case ABCD is a square where it has an area of 4 * 6 = 24 , now as \angle BAD starts going down from 90 degrees to 55 the area obviously reduces. Hence the answer should be B.
is there a possibility that parallelogram could be 90 degree ?
In this case ? No because the angle is defined.
In general ? Every square is a parallelogram.
I use that argument to show you that with confidence the area must be less than 24. Did you understand the argument ?