BE GJ LO QT ?

Concept: Letter-series questions built from paired terms often encode a numeric progression in the alphabet positions of the letters. Convert each letter to its position (A = 1 ... Z = 26) and look for a consistent arithmetic pattern in the differences between consecutive letters — once that pattern is confirmed, it extends forward to give the missing term.

1. Convert every letter of the series B E G J L O Q T to its alphabet position: B = 2, E = 5, G = 7, J = 10, L = 12, O = 15, Q = 17, T = 20.

2. List the consecutive differences: B→E = +3, E→G = +2, G→J = +3, J→L = +2, L→O = +3, O→Q = +2, Q→T = +3.

3. These differences form an unbroken alternating chain: +3, +2, +3, +2, +3, +2, +3 — the chain never resets between pairs.

4. Extend the alternation one step further each time: after +3 (Q→T) comes +2, so 20 + 2 = 22; after that comes +3, so 22 + 3 = 25.

5. Positions 22 and 25 correspond to the letters V and Y, so the missing pair is VY.

Cross-check: Group the pair-wise first letters (B, G, L, Q = 2, 7, 12, 17) and second letters (E, J, O, T = 5, 10, 15, 20) separately — each group rises by exactly 5 every step. Applying that same step gives 17 + 5 = 22 and 20 + 5 = 25, the same two positions, confirming VY.