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What should come in place of the question mark (?) in the given series based on the English alphabetical order? LQO, MRP, NSQ, OTR, ?
USP
UPS
PUS
PSU
PUS
Observe the first, second, and third letters of the clusters separately as independent sequences moving +1 in the alphabet.
Observe the first, second, and third letters of the clusters separately as independent sequences moving +1 in the alphabet.
First Letter Pattern
Extract the 1st letter of each cluster: L(12), M(13), N(14), O(15). The pattern is +1, so the next letter is 16(P).
Second Letter Pattern
Extract the 2nd letter of each cluster: Q(17), R(18), S(19), T(20). The pattern is +1, so the next letter is 21(U).
Third Letter Pattern
Extract the 3rd letter of each cluster: O(15), P(16), Q(17), R(18). The pattern is +1, so the next letter is 19(S).
A: USP starts with U instead of P, failing the first position logic. B: UPS ends with S but has P as the middle letter instead of U. D: PSU ends with U instead of S, failing the third position logic.
C is correct because the sequence follows a simple +1 increment for each position independently: LMNO тЖТ P, QRST тЖТ U, and OPQR тЖТ S, forming PUS.
For alphabetical series, always break down the cluster into individual character positions to identify parallel sequences; this prevents errors caused by looking at the cluster as a whole.
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