The sentence ”I wish it were possible” is correct despite the apparent subject-verb discord because it follows the rules of the subjunctive mood, which permits such constructions. The reason given in (R) accurately explains (A).
List I | List II |
(A)Fits and starts | (1) At appropriate time |
(B)In less than no time | (II) At intervals |
(C) Once in a blue moon | (III) In a moment |
(D) On the dot | (IV) Rarely |