In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: two trains are moving in opposite directions at 60 km / hr and 90 km / hr . their lengths are 1.25 km and 1.00 km respectively . the time taken by the slower train to cross the faster train in seconds is ? 
Options: a ) 48 , b ) 9 , c ) 7 , d ) 67 , e ) 54
Example Output: e

Example Input: Problem: a train 140 meters long takes 6 seconds to cross a man walking at 5 kmph in the direction opposite to that of the train . find the speed of the train . 
Options: a ) 45 kmph , b ) 50 kmph , c ) 55 kmph , d ) 60 kmph , e ) 79 kmph
Example Output: e

Example Input: Problem: find the area of trapezium whose parallel sides are 20 cm and 18 cm long , and the distance between them is 5 cm ? 
Options: a ) 827 cm 2 , b ) 216 cm 2 , c ) 95 cm 2 , d ) 80 cm 2 , e ) 176 cm 2
Example Output:
c