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Which of the following options should come in place of the question mark (?) in the given series based on the English alphabetical order? PRT, QSU, RTV, SUW,?
VXT
VTX
TXV
TVX
TVX
Observe the progression of each position in the triplet independently: each letter increases by +1 in every consecutive triplet.
Observe the progression of each position in the triplet independently: each letter increases by +1 in every consecutive triplet.
Analyze 1st letter of each triplet
P (16) → Q (17) → R (18) → S (19). Following the +1 pattern, the next 1st letter is T (20).
Analyze 2nd letter of each triplet
R (18) → S (19) → T (20) → U (21). Following the +1 pattern, the next 2nd letter is V (22).
Analyze 3rd letter of each triplet
T (20) → U (21) → V (22) → W (23). Following the +1 pattern, the next 3rd letter is X (24).
A: VXT has letters out of sequence. B: VTX has letters out of sequence. C: TXV has letters out of sequence.
D is correct because each letter in the triplets follows a consistent +1 alphabetical progression: P-R-T (+1,+1,+1) → Q-S-U → R-T-V → S-U-W → T-V-X.
For letter series questions, always write the numerical rank (A=1, B=2...) above each letter to quickly identify the constant difference.
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