Which letter-cluster will replace the question mark (?) to complete the given series?
SWBM, OSXI, ?, GKPA, CGLW

Correct option is C

Given:
SWBM, OSXI, ?, GKPA, CGLW
Logic: 1st letter – 4, 2nd letter – 4, 3rd letter – 4, and 4th letter – 4.
From the word - SWBM, OSXI
First letter → S (19) – 4 = O (15)
Second letter → W (23) – 4 = S (19)
Third letter → B (2) – 4 = X (24)
Forth letter → M (13) – 4 = I (9)
Similarly,
OSXI, ?
First letter → O (15) – 4 = K (11)
Second letter → S (19) – 4 = O (15)
Third letter → X (24) – 4 = T (20)
Forth letter → I (9) – 4 = E (5)
Correct answer is (c) KOTE.