Answer:
9/24.
Explanation:
We can see this by finding how 9/24 is simply 3/8 but not simplified down all the way. Notice how when you try simplifying the others, they are either unable to be simplified further or simplify into something else.
2/7--> unable to simplify further.
8/3--> unable to simplify further.
9/24--> simplifies to 3/8.
5/10--> simplifies to 1/2.