Select the letter-cluster that will replace the question mark:
JKL, MNO, PQR, ?

Question

Accepted Answer

1. Each cluster has three letters in order.

2. Letters map to positions: $J(10),K(11),L(12)$; $M(13),N(14),O(15)$; $P(16),Q(17),R(18)$.

3. Each cluster advances by +3 positions. The next positions are $19,20,21$.

4. Positions $19,20,21$ are **S, T, U**. So the correct cluster is **STU**.

FINAL_ANSWER: b

Answer

Answer

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