Explanation:

Let’s break down the code:

- First, check pattern in MORBID ? THGMID.

- The last three letters (‘BID’ and ‘MID’) stay the same.

- The first three letters change: MOR ? THG.

- Looking at the alphabet:

- M(13) ? T(20): +7

- O(15) ? H(8): -7

- R(18) ? G(7): -11

- There’s no clear arithmetic pattern, but the pattern for the last three letters is to keep the same position.

Now, mapping the first three letters of OBTAIN:

- O ? J (following a similar alphabet shift as M ? T, O(15) – 6 = J(10))

- B ? G or F (check possible patterns)

- T ? F or O (analyzing code logic)

- Last three: always add ‘I’, ‘N’ as in original word.

Options:

- 1. GFOJDS

- 2. JOFGSD

- 3. GJFOSD

- 4. JGOFDS

Matching pattern, correct code for the first three letters (from sample) is JGO (matches option 4). Last three letters normally are for the last 3 of original, which is AIN, rearranged in a similar way to MID.

So, the correct answer is:

Option 4: JGOFDS

Summary:

- Last three letters pattern: Keep or slight rearrange.

- First three letters: Alphabet shift.

- Only option 4 keeps the closest structure like MORBID ? THGMID.

- So, Option 4 is correct.