Explanation:

Let’s break down the relationship using both pairs:

- FRONTIER : GSNOUHDS

- Look at each letter:

- F?G (+1), R?S (+1), O?N (-1), N?O (+1), T?U (+1), I?H (-1), E?D (-1), R?S (+1)

- So, Pattern: +1, +1, -1, +1, +1, -1, -1, +1

- Apply the pattern to CLOSING

- C (+1)=D

- L (+1)=M

- O (-1)=N

- S (+1)=T

- I (+1)=J

- N (-1)=M

- G (-1)=F

- This gives: DMNTJMF

None of the options give "DMNTJMF" exactly, but let’s check the closest match:

- Options:

1. DMNTHOH

2. BMPTHOH

3. DMNRHLH

4. DKNTJOH

- Compare with the applied pattern:

- Option 1: DMNTHOH (matches till 4th, but 5th and onwards do not fit the pattern)

- Option 2: BMPTHOH

- Option 3: DMNRHLH

- Option 4: DKNTJOH

- Correct pattern is DMNTJMF, which none matches exactly.

- But option 1 (DMNTHOH) is closest in the sequence.

Correct Answer: Option 1—DMNTHOH

- Pattern alternates between increasing and decreasing letters (as in the first pair).

- The answer fits the sequence best among given choices.