Choose the missing terms out of the given alternatives : W-144, ?, S-100, Q-81, O-64

Answer: Option A

Letters : W - 2 = U - 2 = S - 2 = Q - 2 = O
Numbers : 144 (12² ) → 121 (11² ) → 100 (10² ) → 81 (9² ) → 64 (8² )