Answer:
Length: 4
.Width : 4
Height :10
Explanation:
We know that the volume of a rectangular prism is given by :-
, where l is length, w is width and h is height of the rectangular prism.
Now, The volume of prism A will be :-

Check all the options.




We can see that only option 2. has the same volume as prism A.
Therefore, the dimensions of prism B will be :
Length: 4
.Width : 4
Height :10