Chose the correct code
`{:(,"Column"-I , "Column"-II,), ((P), pK_(b) "of" X^(-) (K_(a) "of" HX = 10^(-6)), (1), 6.9), ((Q), pH of 10^(-8) M HCl, (2),8), ((R), pH of 10^(-2) "M acetic and acid solution" (Take K_(a) of acetic acid=1.6xx10^(-5)), (3), 10.7), ((S), "pOH of a solution obtained by mixing equal volumes of solution with pH 3 and 5"., (4),3.4):}`

Options

A. `{:(,P,Q,R,S),(,1,2,4,3):}`
B. `{:(,P,Q,R,S),(,4,3,2,1):}`
C. `{:(,P,Q,R,S),(,2,1,4,3):}`
D. `{:(,P,Q,R,S),(,1,2,3,4):}`