Let's analyze the pattern: AZ, GT, MN, ?, YB First letters: A(1), G(7), M(13), ?, Y(25) — Increasing by +6 each time: A → G (+6), G → M (+6), M → S (+6), S → Y (+6) So, the missing first letter is S. Second letters: Z(26), T(20), N(14), ?, B(2) — Decreasing by -6 each time: Z → T (−6), T → N (−6), N → H (−6), H → B (−6) So, the missing second letter is H. Thus, the missing term is SH.