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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? YEF, VFI, SGL, PHO,?
NMR
MIR
NMQ
IMR
MIR
Observe the three separate letter series independently: 1st letters move -3 positions, 2nd letters +3 positions, and 3rd letters +3 positions.
Observe the three separate letter series independently: 1st letters move -3 positions, 2nd letters +3 positions, and 3rd letters +3 positions.
Analyze 1st Letters
Y (25), V (22), S (19), P (16). The pattern is -3 for each step. P(16) - 3 = 13, which corresponds to M.
Analyze 2nd Letters
E (5), F (6), G (7), H (8). The pattern is +1 for each step. H(8) + 1 = 9, which corresponds to I.
Analyze 3rd Letters
F (6), I (9), L (12), O (15). The pattern is +3 for each step. O(15) + 3 = 18, which corresponds to R.
A: NMR is wrong because the second letter should be I, not M. C: NMQ is wrong because the third letter should be R, not Q. D: IMR is wrong because the first letter should be M, not I.
B is correct because the series follows a consistent logic where the 1st letter subtracts 3, the 2nd letter adds 1, and the 3rd letter adds 3 to the previous letter's position.
In alphanumeric series, always break down triplets or groups into their respective positional components to spot multiple interleaved patterns quickly.