$\underset{(\mathrm{Dark} \mathrm{purpale} \mathrm{almost} \mathrm{black}}{\left(\mathrm{A}\right)} \stackrel{∆}{\to }\underset{\left(\mathrm{Green}\right)}{\left(\mathrm{B}\right)}+\underset{\left(\mathrm{Black}\right)}{\left(\mathrm{C}\right)}+\left(\mathrm{D}\right)$

Find the number of correct statements :

(a) Compound $\mathrm{B}$ is ${\mathrm{K}}_2{\mathrm{MnO}}_4$
(b) Compound $\mathrm{C}$ is ${\mathrm{MnO}}_2$
(c) Compound $\mathrm{D}$ is ${\mathrm{O}}_2$
(d) Compound $\mathrm{B}$ is paramagnetic in nature
(e) Compound $\mathrm{D}$ has two unpaired electrons in bonding molecular orbital