Consider the diffraction pattern for a small pinhole. As the size of the hole is increased
a) the size of the image decrease
b) the intensity of the image increases
c) the size of the image increases
d) the intensity decrease

On increasing width of hole of pinhole, d increases. Hence the size of central maxima decreases verifies option (a).

As the energy passing through hole increased on increasing the size of hole. So the intensity of pattern will increase. Hence verifies the option (b).