Task: Question Answering
Input (English): Problem: in one year , the population , of a village increased by 20 % and in the next year , it decreased by 20 % . if at the end of 2 nd year , the population was 9600 , what was it in the beginning ? 
Options: a ) 10000 , b ) 8000 , c ) 1988 , d ) 1277 , e ) 2081
Output (English): a