Consider sunlight incident on a pinhole of width $10^3\;A$ . The image of the pinhole seen on a screen shall be

Question

$\begin{array}{1 1} \text{a sharp white ring} \\ \text{different from a geometrical image } \\ \text{a diffused central spot, white in color } \\ \text{diffused colour region around a sharp central white spot} \end{array}$