Identify the wrong term in the series. AH, DL, GP, JS, MX

Concept: In a two-letter alphabetical series, track the two letter positions (first letter of each pair, second letter of each pair) separately. If a track advances by a fixed step size (say +k) every term, then the n-th term's letter equals the first term's letter plus (n - 1) x k. A term is wrong when either of its letters departs from this formula for its position.

1. First-letter track: A, D, G, J, M - position values 1, 4, 7, 10, 13, each exactly 3 more than the last (step = +3). This matches every term (positions 1-5), so the first letters never deviate.

2. Second-letter track expected values (step +4 from H = 8): position 1 -> 8 (H), 2 -> 12 (L), 3 -> 16 (P), 4 -> 20 (T), 5 -> 24 (X).

3. Comparing to the actual second letters given - H, L, P, S, X - position 4 shows S (19) where the formula demands T (20); every other position matches exactly.

Cross-check: Re-checking position 5 independently - M = 1 + 4x3 = 13 and X = 8 + 4x4 = 24 - both match the actual term MX exactly, confirming the +3/+4 steps are correct and the mismatch is isolated to position 4.

So the term at position 4, JS, is the wrong term in the series - it should read JT.