Task: Question Answering
Input (English): Question: A certain quantity of 40% solution is replaced with 25% solution such that the new concentration is 35%. What is the fraction of the solution that was replaced?

 Option A: 1/4

 Option B: 1/3

 Option C: 1/2

 Option D: 2/3

 Option E: 3/4
Output (English): Option B