Consider the following unbalanced redox reaction:

mno4- (aq) + sbh3 (aq) > mno2 (s) + sb (s)

what is the oxidizing agent in the reaction?

a.) mno4-

b.) sbh3

c.) mno2

d.) sb

?

You're oxidising agent will be reduced. In the molecule MnO4-, Mn has and oxidation number of +9 and in MnO2 it is +4, therefore its oxidation number has reduced, therefore Mn is reduced, therefore it is the oxidant/oxidising agent.

Do u have the n? or maybe the m?