Task: Question Answering
Input (English): Problem: fresh grapes contain 90 % by weight while dried grapes contain 20 % water by weight . what is the weight of dry grapes available from 40 kg of fresh grapes ? 
Options: a ) 5 kg , b ) 2.4 kg , c ) 2.5 kg , d ) 10 kg , e ) none of these
Output (English): a