XY ⇒ Delete the last letter,

YZ ⇒ Replace the forth letter with next in the alphabet,

ZX ⇒ Reverse the whole sequence of the letters,

Then LOGICAL ⇒ XY → YZ → ZX → ?

ACJGOL

LOGICAL

Sequence of operations is :-

XY → YZ → ZX

Step 1 :-

XY ⇒ Delete the last letter,

⇒ LOGICAL

= LOGICA

Step 2 :-

YZ ⇒ Replace the forth letter with next in the alphabet,

⇒ LOGICA

= LOGJCA

Step 3 :-

ZX ⇒ Reverse the whole sequence of the letters,

⇒ LOGJCA

= ACJGOL