Task: Question Answering
Input (English): Problem: if a lends rs . 3200 to b at 12 % per annum and b lends the same sum to c at 14.5 % per annum then the gain of b in a period of 5 years is ? 
Options: a ) 157.78 , b ) 157.98 , c ) 400 , d ) 420 , e ) 430
Output (English): c