In the following triads, each group of letters JUNK – UJNK – KUJN LACK – ALCK – KALC

Given pattern:

• First transformation: swap the first two letters
• Second transformation: move the last letter of the original word to the front

Example:
JUNK → UJNK → KUJN
LACK → ALCK → KALC

Now check the options:

1) BUNS → UBNS → SUNB ❌
Second step does not follow the required pattern.

2) MOST → OMST → OSTM ❌
Second step is incorrect.

3) FROM → RFOM → MRFO ✅

• FROM → RFOM (swap first two letters)
• RFOM → MRFO (move last letter to the front) ✔

4) MOCK → MCOK → KCOM ❌
Does not follow the same logic.

Final Answer: FROM - RFOM - MRFO