Explanation:

Let’s break it down step by step:

- We’ve got seven people, one per day, Monday to Sunday.

- D goes second day; that means D is on Tuesday.

- G goes on Friday.

- Three go between D and F. So, F can be either Friday or Saturday/Sunday—but G is already Friday, so map it out carefully.

- One person is between G and C.

- B doesn’t go Monday or Thursday.

- The number of people after C = number before G. Since G is Friday (the fifth day), two before, two after. So C must be on Wednesday.

- That means A goes before C, so could be Monday or Tuesday, but Tuesday is D.

Here’s the order if you lay it out:

- Monday - A

- Tuesday - D

- Wednesday - C

- Thursday - ?

- Friday - G

- Saturday - F

- Sunday - B

- Option 1: Thursday – A is not on Thursday.

- Option 2: Wednesday – A is not on Wednesday.

- Option 3: Monday – Yes, this fits.

- Option 4: Sunday – No, that’s B.

- Option 5: None of the above – Not needed.

So, the answer is Option 3: Monday.