Which compound acts as an oxidising as well as reducing agent [IIT 199

1.	Which compound acts as an oxidising as well as reducing agent [IIT 1991]
A.	\[S{{O}_{2}}\]
B.	\[Mn{{O}_{2}}\]
C.	\[A{{l}_{2}}{{O}_{3}}\]
D.	\[Cr{{O}_{3}}\]
Answer» B. \[Mn{{O}_{2}}\]

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Which compound acts as an oxidising as well as reducing agent [IIT 1991]

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