Select the letter-pair that can replace the question mark (?) in the following series. JL, GJ, DH, AF, ?AYDBXCCYCDXDAnswer: D. XD Read Explanation: J K L(1 letter gap) G H I J(2 letters gap) D E F G H(3 letters gap) A B C D E F(4 letters gap) X Y Z A B C D(5 letters gap) Read more in App