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What should come in place of ? in the given series based on the English alphabetical order? ITV, EPR, ALN, WHJ, ?
SDF
QBH
RCH
QCG
SDF
Calculate the numerical difference for each of the three letters across terms independently: the first letter shifts by -4, the second by -12, and the third by -4 (wrapping around the alphabet).
Calculate the numerical difference for each of the three letters across terms independently: the first letter shifts by -4, the second by -12, and the third by -4 (wrapping around the alphabet).
Analyze the first letter of each cluster
I(9), E(5), A(1), W(23). Pattern: 9 - 4 = 5, 5 - 4 = 1, 1 - 4 = -3 (which is 23 in mod 26), 23 - 4 = 19. The 19th letter is S.
Analyze the second letter of each cluster
T(20), P(16), L(12), H(8). Pattern: 20 - 4 = 16, 16 - 4 = 12, 12 - 4 = 8, 8 - 4 = 4. The 4th letter is D.
Analyze the third letter of each cluster
V(22), R(18), N(14), J(10). Pattern: 22 - 4 = 18, 18 - 4 = 14, 14 - 4 = 10, 10 - 4 = 6. The 6th letter is F.
B: QBH results in incorrect positional values for all letters. C: RCH results in incorrect positional values for all letters. D: QCG results in incorrect positional values for all letters.
A is correct because the series follows a consistent -4 decrement for every character position across all clusters, yielding S, D, and F respectively.
In alphabetical series, always convert letters to their numerical positions (A=1, Z=26) first to identify constant differences quickly.
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