In the following reaction, Bromine is

a$.$ Bromine is oxidized.

b$.$ Bromine is the oxidizing agent.

c$.$ Both $($a$)$ and $($b$)$ are true.

d$.$ None of the above.

When $Mn{O}_4^{-}$is converted into $M{n}^{5+}$ in a redox reaction,

electrons are

by each manganese atom.

a$.6,$ lost

b$.6,$ gained

c$.4,$ lost

$($d$.)4,$ gained

e$.2,$ lost

f$.2,$ gained