Consider the species $\mathrm{NO}, \mathrm{I}_{2}, \mathrm{I}_{2}^{-}, \mathrm{Cu}^{2+}$ and $\mathrm{VO}^{2+}$. The number of paramagnetic species among them and the EPR inactive species, respectively, are
(a)4 and $\mathrm{I}_{2}^{-}$
(b)4 and $\mathrm{I}_{2}$
(c)3 and $\mathrm{VO}^{2+}, \mathrm{Cu}^{2+}$
(d)3 and $\mathrm{NO}, \mathrm{Cu}^{2+}$
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Paramagnetic: NO, I₂⁻, Cu²⁺ (d⁹), VO²⁺ (d¹) — four; I₂ is diamagnetic and hence EPR-inactive.