Which of the following complex compound(s) is/are paramagnetic and low spin

CHEMISTRY · Single correct · A Level · Chemistry · Transition metals and their chemistry · Transition metals and their chemistry

Problem

Which of the following complex compound(s) is/are paramagnetic and low spin? (I)

\text{K}_3[\text{Fe}(\text{CN})_6]

(II)

[\text{Ni}(\text{CO})_4]^0

(III)

[\text{Cr}(\text{NH}_3)_6]^{3+}

(IV)

[\text{Mn}(\text{CN})_6]^{4-}

Choose the correct code : (1) I only (2) II and III (3) I and IV (4) IV only