Task: Question Answering
Input (English): Problem: a sum of rs 468.75 was lent out at simple interest and at the end of 1 year and 8 months, the total amount of rs 500 is received. find the rate of interest ?
Options: a. 3 %, b. 4 %, c. 5 %, d. 6 %, e. 7 %
Output (English): b