HWG
In the above question, the pattern is,
1st letter
$latex B\xrightarrow{\text{+2}}D \xrightarrow{\text{+2}}F\xrightarrow{\text{+2}} \textcircled{H} \xrightarrow{\text{+2}}J $
2nd letter
$latex Z\xrightarrow{\text{-1}}Y \xrightarrow{\text{-1}}X\xrightarrow{\text{-1}} \textcircled{W} \xrightarrow{\text{-1}}V $
3rd letter
$latex A\xrightarrow{\text{+2}}C \xrightarrow{\text{+2}}E\xrightarrow{\text{+2}} \textcircled{G} \xrightarrow{\text{+2}}I$