Complete the series BB, FE, II, ML, PP, ...........by choosing one of the…

Solution: Determine the pattern for the first and second letters separately.

• First letters: B, F, I, M, P ... (positions 2, 6, 9, 13, 16). Differences: +4, +3, +4, +3. Next: 16 + 4 = 20 → T.

• Second letters: B, E, I, L, P ... (positions 2, 5, 9, 12, 16). Differences: +3, +4, +3, +4. Next: 16 + 3 = 19 → S.

• Therefore the next pair is T S, so the correct answer is TS.

Why the other choices are wrong:

• ST: Letters are swapped compared with the required order (first should be T, second should be S).

• RS: The first letter should be T (20); R (18) does not match the alternating +4/+3 progression.

• SR: Both letters are incorrect for the next pair (expected T, S).