d- and f-Block Elements: JEE Main 2024 Chemistry question

Among $\mathrm{CrO}, \mathrm{Cr}_2 \mathrm{O}_3$ and $\mathrm{CrO}_3$, the sum of spin-only magnetic moment values of basic and amphoteric oxides is _________ $10^{-2} \mathrm{BM}$ (nearest integer). (Given atomic number of $\mathrm{Cr}$ is 24 )