Select the correct statement or statements, out of the following, about diffraction at N parallel slits.

A

There are (N-1) minima between each pair of principal maxima.

B

There are (N-2) secondary maxima between each pair of principal maxima.

C

Width of principal maximum is proportional to $$\frac{1}{N}$$.

D

The intensity at the principal maxima varies as $$N^2$$.