Derive the general selection rules for which planes, indexed in (h,k,l), are observed in X-ray scattering from BCC and FCC lattices.
A) (h+k+l) must be odd for BCC, and (h,k,l) must be all odd or all even for FCC
B) (h+k+l) must be even for BCC, and (h,k,l) must be all even for FCC
C) (h+k+l) must be odd for BCC, and (h,k,l) must be all even or all odd for FCC
D) (h+k+l) must be even for BCC, and (h,k,l) must be all odd for FCC
