At the First Minimum Adjacent to the Central Maximum of a Single-Slit

Multiple Choice

At the first minimum adjacent to the central maximum of a single-slit diffraction pattern the phase difference between the Huygens wavelet from the top of the slit and the wavelet from the midpoint of the slit is:

A) " $\pi$ /8 rad"
B) " $\pi$ /4 rad"
C) " $\pi$ /2 rad"
D) " $\pi$ rad"
E) "3 $\pi$ /2 rad"