Explanation:

Let's analyze the statements step-by-step:

- There are exam dates: 5th and 20th of March, May, June, and July (8 slots).

- C has exam on 20th May, immediately before A (So, A is on 5th June).

- D's exam is in a month with 30 days (June), and E is immediately after D.

- F’s exam is immediately after G’s but not in the same month (so, G is at the end of a month, F at the start of the next).

- Two between A and B.

- H is one of the candidates.

Let’s arrange:

1. March: 5th, 20th

2. May: 5th, 20th (C - 20th May, A - 5th June)

3. June: 5th (A), 20th

4. July: 5th, 20th

Now, E is right after D in June (30 days). Only possible pairs: 5th June (A), 20th June (D/E). Assign D to 20th June, E to 5th July.

G and F: F right after G, different months. G at 20th May (C already placed), so G at 20th March, F at 5th May.

Now, assign H and B. Two between A and B: A is 5th June, so B can be 5th March or 20th July.

Now, H and 5th July (E). How many in between?

Arranged order:

1. 5th March

2. 20th March (G)

3. 5th May (F)

4. 20th May (C)

5. 5th June (A)

6. 20th June (D)

7. 5th July (E)

8. 20th July

Check possible H places;

Suppose H = 5th March: 1-7: 5 people in between.

If H = 20th July: 7-8: 0

If H elsewhere: always fewer.

So if H is at 5th March, five people are between H and 5th July.

Correct answer: Option 1, Five.