Which three-letter combination is different from the rest?
ACD, BDF, CEH, DFI, EGK
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. DFI.
Given series: ACD, BDF, CEH, DFI, EGK
A + 1 = B, B + 1 = C, C + 1 = D, D + 1 = E
C + 1 = D, D + 1 = E, E + 1 = F, F + 1 = G
D + 2 = F, F + 2 = H, H + 2 = J, J + 2 = L