Solutions A and B contain acid and water in the ratio 3 ∶ 5 and 9 ∶ 7, respectively. Solution A and B are mixed into the ratio of 2 ∶ 3. What is the ratio of acid and water in the resulting solution?

1
9 ∶ 11 
2
19 ∶ 21
3
39 ∶ 41
4
37 ∶ 43

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