To determine how Y is related to X, we analyze the information given in the statements.
With the given information, Statement 2 alone provides enough detail that Y is the mother of X. Therefore, the correct answer is that "statement (2) alone is sufficient to answer the question."

The pie-diagram below shows the percentage of expenditures of Paul and Balu per month.

If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?