The diagonal of the square inscribed inside the circle will be equal to the diameter of the circle which is 8. So each side of the square is 8/(2^(1/2)). Hence the area of the square comes out to be the square of the side. In this case, 32 square units.Meanwhile area of circle will be (pi)r^2 or 3.14*16 which is a value greater than 48.
Hence, option B > option A.