Which letter cluster will replace the question mark (?) to complete the given series?
UERB, RHOE, ?, LNIK, IQFN
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. OKLH.
U - 3 = R, R - 3 = O, O - 3 = L, L - 3 = I
E + 3 = H, H + 3 = K, K + 3 = N, N + 3 = Q
R - 3 = O, O - 3 = L, L - 3 = I, I - 3 = F
B + 3 = E, E + 3 = H, H + 3 = K, K + 3 = N