Which letter cluster will replace the question mark (?) to complete the given series?
ABCD, BDFD, CFID, ?, EJOD
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. DHLD.
The series follows this pattern:
ABCD, BDFD, CFID, ?, EJOD
A + 1 = B, B + 1 = C, C + 1 = D; D + 1 = E
B + 2 = D, D + 2 = F, F + 2 = H; H + 2 = J
C + 3 = F, F + 3 = I, I + 3 = L; L + 3 = O