Task: Question Answering
Input (English): Problem: a and b are two partially filled buckets of water. if 5 liters are transferred from a to b, then a would contain one - third of the amount of water in b. alternatively, if 4 liters are transferred from b to a, b would contain one - half of the amount of water in a. bucket a contains how many liters of water ?
Options: a. 11, b. 52 / 5, c. 17, d. 21, e. 23
Output (English): b