These 12 elements form a set with a certain pattern, but there is one element that does not fit. Which one is that?
I would say that the
First one, SRR is the odd one out.
Each of the other strings can begin an English word. SCRape, APple, CALm, FIAt, CHLorine, DOCtor, RENt, EMPire, MIEn, COal, MEIosis to name some examples.