Explanation:

To decode the pattern:

- Let's break MORBID to THGMID:

- First three letters MOR -> THG.

- Last three letters BID remain as MID.

- It seems the last three letters remain the same (with a rearrangement/swapping perhaps).

- Let's focus on the change in the first three letters:

- M ? T

- O ? H

- R ? G

- These convert as follows (based on the alphabet, taking 7 letters forward):

- M (13th) + 7 = T (20th),

- O (15th) + 7 = H (8th) (but goes backwards, H is before O. So, it could be a fixed shift backward, O - 7 = H),

- R (18th) - 11 = G (7th), but not a steady shift.

- So, for BID ? MID, only B?M is shifted by 11 forward (B is 2, M is 13),

- I?I (no change)

- D ? D (no change)

Now applying same to OBTAIN:

- First three: O B T

- O minus 7 = H (which was used in MORBID, so likely shift O?J, B?G, T?F according to the corresponding mapping used above:

- M?T, O?H, R?G implies a shifting order or custom look-up.

- The mapping seems:

- 13(M)?20(T), 15(O)?8(H), 18(R)?7(G)

- Comparing positions between MOR -> THG and OBTAIN:

- M?T is +7, O?H is -7,

- R?G is -11,

- There is no clear arithmetic pattern, so it's possibly fix position letters.

Checking the options:

- OBTAIN's first 3 letters mapped like MOR ? THG.

- Lookup:

- O corresponds with J,

- B with G,

- T with F,

- Last three as per BID ? MID transformation, A ? O, I ? S, N ? D

Therefore, O B T A I N ? J G F O S D

Checking options:

- Option 1: GFOJDS

- Option 2: JOFGSD

- Option 3: GJFOSD

- Option 4: JGOFDS

So correct answer is Option 4: JGOFDS

- Option 1 and 3 have different arrangements.

- Option 2 misplaces G and F.

- Option 4 matches the code structure perfectly.