FAG, GAF, HAI, IAH, ____ Choices
A) SIK  B) IKP  C) PLE  D) JAK  E) EWR
The middle letters are static, so concentrate on the first and third letters. The series involves an alphabetical order with a reversal of the letters. The first letters are in alphabetical order: F, G, H, I , J. The second and fourth segments are reversals of the first and third segments. The missing segment begins with a new letter.   ANSWER:JAK
<result>D</result>
FAG, GAF, HAI, IAH, ____