GMJ
In the above question, the pattern is,
1st letter
$latex A\xrightarrow{\text{+1}}B \xrightarrow{\text{+2}}D \xrightarrow{\text{+3}}G \xrightarrow{\text{+4}} \textcircled{K} $
2nd term
$latex Y\xrightarrow{\text{-3}}V \xrightarrow{\text{-4}}R \xrightarrow{\text{-5}}M \xrightarrow{\text{-6}} \textcircled{G} $
3rd term
$latex D\xrightarrow{\text{+2}}F \xrightarrow{\text{+2}}H \xrightarrow{\text{+2}}J \xrightarrow{\text{+2}} \textcircled{L} $