Explanation:

Let’s break it down:

- A and B originally shared profits in a 7:3 ratio.

- A's original share is 7/10, and B's original share is 3/10.

- A sacrificed 1/7th of his share: (1/7) * (7/10) = 1/10.

- B sacrificed 1/3rd of his share: (1/3) * (3/10) = 1/10.

- C gets A's sacrifice + B's sacrifice, which totals 1/10 + 1/10 = 2/10 = 1/5.

Now, calculate the new shares:

- A's new share: (7/10) - (1/10) = 6/10 = 3/5.

- B's new share: (3/10) - (1/10) = 2/10 = 1/5.

- C's share: 1/5.

This results in the ratio: 3/5 : 1/5 : 1/5, which simplifies to 3 : 1 : 1.

- Option 1: 3 : 1 : 1 - Correct Answer

- Option 2: 2 : 1 : 1 - Incorrect

- Option 3: 2 : 2 : 1 - Incorrect

- Option 4: None of the above - Incorrect