Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
EBD, JGI, ?, TQS, YVX

Correct option is B

To solve this problem, let's analyze the pattern in the given series:
The series is: EBD, JGI, ?, TQS, YVX
1. First letters (E, J, ?, T, Y):
· E to J: The position difference is +5 (E is the 5th letter, J is the 10th letter).
· J to O: The position difference is +5 (J is the 10th letter, O is the 15th letter).
· O to T: The position difference is +5 (O is the 15th letter, T is the 20th letter)
· T to Y: The position difference is +5 (T is the 20th letter, Y is the 25th letter).
Logic : The pattern alternates between +5. So, the missing letter should follow the +5 pattern.
· J (10) + 5 = 15, which corresponds to the letter 'O'.
Similarly remaining letters following the same logic.
Second letter = B +5 = G, G + 5 = L, L + 5 = Q, Q + 5 = V
Third letter = D + 5 = I, I + 5 = N, N + 5 = S, S + 5 = X
Finally missing term is OLN.