Select the term from among the given options that can replace the question mark (?) in the following series.

PKI 23, MHF 31, JEC 47, GBZ 79, DYW 143, ?

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)

Second letters

K -3 → H (8)

H -3 → E (5)

E -3 → B (2)

B -3 → Y (25)

Third letters (I, F, C, Z, W)

I -3 → F (6)

F -3 → C (3)

C -3 → Z (26)

Z -3 → W (23)

 Analyzing the Numbers

23 +8 → 31

31+16 → 47

47 +32 → 79

79 +64 → 143

So, AVT 271 is right answer.

Thus, correct option is (a).

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