Task: Question Answering
Input (English): Problem: a , b and c enter into partnership . a invests some money at the beginning , b invests double the amount after 6 months , and c invests thrice the amount after 8 months . if the annual gain be rs . 19200 . a ' s share is ? 
Options: a ) 8876 , b ) 2765 , c ) 6400 , d ) 1298 , e ) 1261
Output (English): c