Task: Question Answering
Input (English): Problem: a , b and c invested rs . 6300 , rs . 4200 and rs . 10500 respectively , in a partnership business . find the share of a in profit of rs . 13000 after a year ? 
Options: a ) 3630 , b ) 3900 , c ) 8828 , d ) 2387 , e ) 2813
Output (English): b