Since each of the four owners has an equal share, initially each one owned 1/4 of the business.
When the first man sells half of his share to the woman, he is left with 1/8 of the business, while the woman now owns 1/4 + 1/8 = 3/8 of the business.
When the second man keeps 2/3 of his share and sells 1/3 to the woman, he is left with 2/12 = 1/6 of the business, while the woman now owns 3/8 + 1/12 = 11/24 of the business.
Therefore, the answer is (G) 11/24.