Explanation:

Let’s break it down:

- FHJL: F-G (+1), H-I (+1), J-K (+1), L-M (+1) — Wait, that doesn't fit. Let's check real jumps. F?H (+2), H?J (+2), J?L (+2) — so, skips one letter each time.

- PRTV: P?R (+2), R?T (+2), T?V (+2) — again, skipping one letter each time.

- GIKN: G?I (+2), I?K (+2), K?N (+3) — first two jumps are +2, last is +3.

- MOQS: M?O (+2), O?Q (+2), Q?S (+2) — again, +2 for each jump.

Here’s what really matters: Every option except GIKN jumps exactly 2 letters every time. GIKN jumps +2, +2, then +3.

The one that doesn’t match the rest is option 3: GIKN.

Option:3- GIKN is the odd one out.