Consider the diffraction of light by a single slit described in this case study. The first minimum falls at an angle $\theta$ equal to : (A) $\sin^{-1} (0.12)$ (B) $\sin^{-1} (0.225)$ (C) $\sin^{-1} (0.32)$ (D) $\sin^{-1} (0.45)$