Logic: There is a family and we need to draw a family tree and find the relation of "B" with respect to "Y".Consider the following family chart:A and B are sisters. A is the sister of X. X and Y are a married couple.The final family tree will be:As it can be seen that "B" is the Sister-in-law of "Y".Therefore, the correct answer should be "Option 2: Sister-in-law". Mistake PointsGender of X and Y is not clear but here we have to find how B is related to Y.Here we don't need to know the Gender of either X or Y. Gender of B is required which is already mentioned.