Which letter-cluster will replace the question mark (?) to complete the given series?
VRPL, UQOK, ? , SOMI, RNLH

Correct option is A

Given: VRPL, UQOK, ? , SOMI, RNLH
Let's analyze the changes in each letter from one term to the next:
VRPL to UQOK:
V to U: V (22nd letter) - 1 = U (21st letter)
R to Q: R (18th letter) - 1 = Q (17th letter)
P to O: P (16th letter) - 1 = O (15th letter)
L to K: L (12th letter) - 1 = K (11th letter)
UQOK to ?:
U to S: U (21st letter) - 1 = T (20th letter)
Q to O: Q (17th letter) - 1 = P (16th letter)
O to M: O (15th letter) - 1 = N (14th letter)
K to I: K (11th letter) - 1 = J (10th letter)
Correct answer is (a) TPNJ.