Match column-I with column-II and select the appropriate option.
Column-I
(A) Li
(B) Be
(C) K
(D) Ca
Column-II
(P) \(ns^2np^6\) configuration in dipositive ion
(Q) Most electropositive in column-I
(R) No characteristic colour on bunsen flame
(S) Produces hydrated perchlorate (\(MClO_4 \cdot 3H_2O\))