Explanation:

Let’s break this down step by step, because there are a lot of moving parts.

- "Three persons buy items between A and D." This means A and D can’t be next to each other. If you imagine the sequence, A _ _ _ D or D _ _ _ A.

- "Two persons between B and A." So, B _ _ A or A _ _ B.

- "A buys item immediately before G and after C." Now, this tells you C, A, G are all in sequence: C A G.

- "Two people between H and C." So, H _ _ C or C _ _ H.

- "A buys after B." Okay, so B comes before A somewhere.

- "F before E," but neither are first or last.

When you try to fit all that together, the only arrangement that works is:

1. H

2. B

3. C

4. A

5. G

6. F

7. E

8. D

So, who buys last? D is the 8th person.

Now the options:

- C — buys 3rd.

- D — buys 8th.

- F — buys 6th.

- A — buys 4th.

- G — buys 5th.

Correct answer: Option 2, D.