How Wide Must a Narrow Slit Be If the First $\pm$

Multiple Choice

How wide must a narrow slit be if the first diffraction minimum occurs at $\pm$ 12 $\degree$ with laser light of 633 nm?

A) 3.0 * 10-6 m
B) 3.0 * 10-5 m
C) 6.1 * 10-6 m
D) 6 .1* 10-5 m
E) 1.5 * 10-6 m