Correct option is A
Series: 2A-50, 5Z-46, 8B-42, 11Y-38, ?

Right-side numbers decreasing by 4. → next = 34.
Alphabets: A, Z, B, Y → pattern alternates between forward and reverse order. After A → Z, then B → Y, the next must be C.
Thus, the correct option is: (a) 14C-34