Task: Question Answering
Input (English): Problem: a sum of money becomes 7 / 6 of itself in 2 years at a certain rate of simple interest . the rate per annum is ? 
Options: a ) 50 / 9 , b ) 50 / 7 , c ) 50 / 6 , d ) 50 / 8 , e ) 50 / 3
Output (English): c