Match the following

Answer

A-PQR; B-PQ ; C-PQ ; D-R,S

Explanation

`Cr(z) = 24 , E.C = 1s^2 2s^2 2p^6 3s^6 4s^1 3d^5`
`Cu(Z) , E.C = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^(10)`
K(z) = 19 , E.C = `1s 2s^2 2p^6 3s^2 3p^6 4s^1 `
`Fe(z) = 26, E.C = 1s^2 2s^2 2p^6 3s^6 3p^6 4s^2 3d^6`