A) \[Mn{{O}_{2}}\]
B) \[KMn{{O}_{2}}\]
C) MnO
D) \[M{{n}_{2}}{{O}_{7}}\]
Correct Answer: C
Solution :
Mn is in +2 oxidation state in MnO while in other compounds it is in higher oxidation state, number of electrons per proton decreases the size decreases.
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