Explanation:

To decode the given problem, let's break it down:

- MULTIPLE is written as EILLMPTU in the code language.

- Notice that the word MULTIPLE is rearranged to form EILLMPTU by sorting its letters alphabetically.

- Applying the same rule to RAVENING:

- Original: RAVENING

- Sorted alphabetically: AEGINNRV

Now, let's evaluate the options:

- Option 1: AREVINGN

- Letters are not alphabetically sorted.

- Option 2: AEIGNNVR

- Letters are not fully correctly sorted.

- Option 3: EVARGNIN

- Letters are not alphabetically sorted.

- Option 4: AEGINNRV

- Letters are correctly sorted in alphabetical order.

Hence, the correct answer is:

- Option 4: AEGINNRV

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