d
\(P (0)\) : Phosphorus is not a d-block element. It is an element from p-block (\(15\) group or Nitrogen group), thus, can not have any valance electron in \(d\) subshell.

All other elements are \(d-block\) elements therefore has valance electron in \(3 d\) subshell.

Electronic configuration of \(Cr ( I )\) is \(1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^5\).

Electronic configuration of \(F (III)\) is \(1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^5\)

Electronic configuration of \(Mn (II)\) is \(1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^5\).

So, all these have valence electrons in \(3 d\) - subshell.