Pick out the incorrect statement:
A. `MnO_(2)` dissolves in conc. `HCL,` but does not form `Mn^(4+)` ions
B. `MnO_(2)` oxidizes hot concentrated `H_(2)SO_(4)` liberating oxygen
C. `K_(2)MnO_(4)` is formed when `MnO_(2)` in fused `KOH` is oxidised by air, `KNO_(3),PbO_(2)` or `NaBiO_(3)`
D. Decomposition of acidic `KMnO_(4)` is not catalysed by sunlight
