D And F Block Elements

Consider the following reaction

\(\mathrm{MnO}_2+\mathrm{KOH}+\mathrm{O}_2 \rightarrow \mathrm{A}+\mathrm{H}_2 \mathrm{O} \text {. }\)

Product '\(\mathrm{A}\)' in neutral or acidic medium disproportionate to give products '\(\mathrm{B}\)' and '\(\mathrm{C}\)' along with water. The sum of spin-only magnetic moment values of \(\mathrm{B}\) and \(\mathrm{C}\) is ________ BM. (nearest integer) (Given atomic number of \(\mathrm{Mn}\) is 25)