In the series 1, A, 9, I, 17, _________ what comes next?

Question: In the series 1, A, 9, I, 17, _________ what comes next?

Solution:
The series follows a pattern of alternating numbers and letters.

Number pattern: 1, 9, 17 (each +8)

Letter pattern: A, I, ...
The position of A is 1st and I is 9th in the alphabet.
The difference between their positions is (9 - 1) = 8.
Following this +8 pattern, the next letter position should be 9 + 8 = 17.

The 17th letter of the alphabet is Q.
∴ The next element in the series is Q.

Correct Answer: ঘ) Q