Task: Question Answering
Input (English): Problem: in a maths test , students were asked to find 5 / 16 of a certain number . one of the students by mistake found 5 / 6 th of that number and his answer was 100 more than the correct answer . find the number . 
Options: a ) 192 , b ) 280 , c ) 384 , d ) 400 , e ) 500
Output (English): a