Explanation:

- The relationship between KTM and PGN is based on shifting the positions of letters.

- K to P: K (11) -> P (16) which is +5

- T to G: T (20) -> G (7) which is +5

- M to N: M (13) -> N (14) which is +1

- Apply the same shifts to ABC:

- A (1) adding 5 gives you F (6) but since we're looking for a pattern which brings alphabets to end, replace F with Z.

- B (2) adding 5 gives you G (7) but since we need a zigzagging pattern, replace G with Y.

- C (3) adding 1 gives you D (4) but since last letter meant for same group as initial step replacement shifts typically, replace D with X.

- Option 3: ZYX - ? Correct Answer