Explanation:

- Look at the pattern in the given examples:

- 'HORNS' is transformed to 'SLIMH.'

- Each letter is replaced: H?S, O?L, R?I, N?M, S?H.

- 'PIRTA' becomes 'KRIGZ.'

- The pattern: P?K, I?R, R?I, T?G, A?Z.

- Analyze:

- Observe the reverse alphabetical order shift:

- In both words, letters are replaced by others further back in the alphabet.

- Apply the pattern to 'SONG':

- S?H

- O?L

- N?M

- G?T

- Match with given options:

- Option 1: HLNT

- Option 2: HLOS

- Option 3: HMLS

- Option 4: HLMT

- Correct Answer: HLMT

- Option 4: HLMT