Task: Question Answering
Input (English): Problem: if a lends rs. 2000 to b at 15 % per annum and b lends the same sum to c at 17 % per annum then the gain of b in a period of 4 years is ?
Options: a. 155, b. 162, c. 157.5, d. 160, e. 157.12
Output (English): d