Task: Question Answering
Input (English): Problem: raman mixed 54 kg of butter at rs . 150 per kg with 36 kg butter at the rate of rs . 125 per kg . at what price per kg should he sell the mixture to make a profit of 40 % in the transaction ? 
Options: a ) 129 , b ) 287 , c ) 196 , d ) 188 , e ) 112
Output (English): c