Answer: First prism has the greatest volume.
Explanation:
Since we have given that
Volume of prism = Length × Breadth × Height
So, we need to find the greatest volume, for which we find volumes of all figures:
1) Volume of prism would be

2) Volume of prism would be

3) volume of prism would be

4) Volume of prism would be

Hence, first prism has the greatest volume.