Task: Question Answering
Input (English): Problem: in an election between two candidates , the winner has a margin of 20 % of the votes polled . if 1000 people change their mind and vote for the loser , the loser would have won by a margin of 20 % of the votes polled . find the total number of votes polled in the election ? 
Options: a ) 10000 , b ) 5000 , c ) 15000 , d ) 20000 , e ) 6000
Output (English): b