Answer:
OPTION C
Explanation:
If SOLUTION A has 4 cups then SOLUTION B has 2. If SOLUTION A has 8 then SOLUTION B has 4.
Note that for every 2 cups of Solution A, we have 1 cup of Solution B.
So, OPTION A is incorrect.
If there are 4 cups of Solution A, then there are 4 + 2 cups in total.
That means the ratio of cups of SOLUTION A to the total number of cups is:
4 : 6 = 2 : 3
Similarly, 8 : 12 = 2 : 3
And, 12 : 18 = 2 : 3
And, 16 : 24 = 2 : 3
So, we see that the ratio is 2 : 3.
Therefore, OPTION C is the correct answer.