Correct option is A
Given: PKI 23, MHF 31, JEC 47, GBZ 79, DYW 143, ?
Logic: First and Second letter is decreasing by 3 place and number is increasing by multiple of 8, 16, 32, 64, 128, ....
First letters (P, M, J, G, D)
P (1-3 → M (13)
M -3 → J (10)
J (-3 → G (7)
G -3 → D (4)
D -3 → A (1)
Second letters
K -3 → H (8)
H -3 → E (5)
E -3 → B (2)
B -3 → Y (25)
Y -3 → V (22)
Third letters (I, F, C, Z, W)
I -3 → F (6)
F -3 → C (3)
C -3 → Z (26)
Z -3 → W (23)
W -3 → T (20)
Analyzing the Numbers
23 +8 → 31
31+16 → 47
47 +32 → 79
79 +64 → 143
143 +128 → 271
So, AVT 271 is right answer.
Thus, correct option is (a).
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