Thus before considering + which has the least priority, we get $A + (BCD+*F/) + (DE*)$
Now if we assume left associativity for $+$ (default), we get $ABCD+*F/ + DE*+$ but this is not among the options.
So, considering right associativity for $+$ we get $ABCD+*F/DE*++$
Correct Answer: $B$