Atomic number of Cr and Fe are respectively 24 and 26, which of the following is paramagnetic with the spin of electron : -

Question

( A ) $[Fe(CN)_6]^{–4}$
( B ) $[Cr(NH_3)_6]^{+3}$
( C ) $[Cr(CO)_6]$
( D ) $[Fe(CO)_5]$