Two Planes of a Crystal Are Separated by 3 $\times$ 10^-10 M)

Multiple Choice

Two planes of a crystal are separated by 3.25 Angstroms (or 3.25 $\times$ 10^-10 m) . How many maxima will there be in the diffraction pattern of 2.0 Angstrom X-rays from this crystal?

A) 4
B) 2
C) 3
D) an infinite number
E) 1