Task: Question Answering
Input (English): Problem: in what ratio must rice of rs. 16 per kg be mixed with rice of rs. 24 per kg so that cost of mixture is rs. 18 per kg ?
Options: a. 4: 1, b. 2: 1, c. 3: 1, d. 4: 3, e. 4: 5
Output (English): c