Explanation:

- The original profit-sharing ratio between A and B is 3:2.

- A's original share is 3/5, and B's original share is 2/5.

- A sacrifices 1/3 of his share for C: \( \frac{1}{3} \times \frac{3}{5} = \frac{1}{5} \).

- B sacrifices 1/4 of his share for C: \( \frac{1}{4} \times \frac{2}{5} = \frac{1}{10} \).

- C’s total share from A and B is \( \frac{1}{5} + \frac{1}{10} = \frac{2}{10} + \frac{1}{10} = \frac{3}{10} \).

So, the correct answer is Option 3: 3/10.

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