Task: Question Answering
Input (English): Problem: a began business with rs . 45000 and was joined afterwards by b with rs . 5400 . when did b join if the profits at the end of the year were divided in the ratio of 2 : 1 ? 
Options: a ) 7 , b ) 8 , c ) 9 , d ) 6 , e ) 5
Output (English): a