Task: Question Answering
Input (English): Problem: bhatia , ashtikar and singh begin to play with rs 70 each . at the end the ratio of the amounts left with ashtikar and singh is 1 : 2 and of those with singh and bhatia is 4 : 1 . what is singh ' s gain ( in rs ) ? 
Options: a ) 40 , b ) 45 , c ) 48 , d ) 50 , e ) 53
Output (English): d