Task: Question Answering
Input (English): Problem: a train consists of 12 boggies , each boggy 15 metres long . the train crosses a telegraph post in 9 seconds . due to some problem , three boggies were detached . the train now crosses a telegraph post in 
Options: a ) 6.75 sec , b ) 12 sec , c ) 15 sec , d ) 20 sec , e ) none of these
Output (English): a