The odd one out is C. SFiK.
All the other options have the first and third letters in alphabetical order.
A. APoQ - A comes before P and Q comes after O. B. DXeM - D comes before E and M comes after X. D. OWjB - O comes before W and J comes after B. E. CquL - C comes before Q and L comes after U.
In C. SFiK, S comes before F and I comes after K.
