Task: Question Answering
Input (English): Problem: in a parallelogram , the length of one diagonal and the perpendicular dropped on that diagonal are 30 and 20 metres respectively . find its area 
Options: ['a ) 600 m 2', 'b ) 540 m 2', 'c ) 680 m 2', 'd ) 574 m 2', 'e ) none of these']
Output (English): a