CsBr crystallizes in a body centred cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being $6.02\times10^{23} mol^{-1} $, the density of CsBr is:-

Question

( A ) $8.25g/cm^3 $
( B ) $42.5g/cm^3 $
( C ) $4.25g/cm^3 $
( D ) $0.425g/cm^3 $