Match the column I and II
`{:(,"Column (I)",,"Column (II)",),(,"Group",,"Effect on phenyl ring",),((a),-CH = CH - CO_(2)H,(p),p//p - "directors",),((b),-O - overset(O)overset(||)(S) - CH_(3),(q),"meta-directors",),((c),-NH - overset(O)overset(||)(C) - CH_(3),(r),"Activating group",),((d),- underset(O)underset(||)(S) - CH_(3),(s),"De-activating group",):}`

Answer

a -p, s; b -p, r; c - p, r; d- p, s

Explanation

Basic information