Hello aspirant,

The question is-

Q- After the following outer electronic configuration after atom the Highest Oxidation state is achieved by which one of them-

a) (n-1)*d^8*n*s^2

b) (n-1)*d^5*n*s^2

c) (n-1)*d^3*n*s^2

d) (n-1)*d^5*n*s^1

A- The following outer electronic configuration after atom, the highest oxidation is achieved by (n-1)*d^5*n*s^2------> [Mn]

Manganese shows the highest oxidation state= +7

Hope, it helps you.