Task: Question Answering
Input (English): Problem: find the ratio in which rice at rs. 7.20 a kg be mixed with rice at rs. 5.70 a kg to produce a mixture worth rs. 6.30 a kg
Options: a. 2: 0, b. 2: 3, c. 2: 1, d. 2: 2, e. 2: 8
Output (English): b