Explanation:

- Let's define the present ages of A, B, and C as 2x, 3x, and 5x, respectively, based on the given ratio 2:3:5.

- The average age of A and B is 25, so (2x + 3x)/2 = 25, which simplifies to 5x = 50, so x = 10.

- The current ages are A = 20, B = 30, and C = 50.

- The average age of B and C is 40, so (3x + 5x)/2 = 40, which is consistent since 8x = 80, confirming x = 10.

- In two years, their ages will be A = 22, B = 32, and C = 52.

- The sum of their ages after two years is 22 + 32 + 52 = 106.

The correct answer is Option 3: 106.