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'.

Ex Input:
Problem: two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 21 seconds . the ratio of their speeds is ? 
Options: a ) 3 / 6 , b ) 3 / 2 , c ) 2 / 3 , d ) 3 / 5 , e ) 5 / 2

Ex Output:
c


Ex Input:
Problem: a trader sells 45 meters of cloth for rs . 4500 at the profit of rs . 14 per metre of cloth . what is the cost price of one metre of cloth ? 
Options: a ) rs . 80 , b ) rs . 86 , c ) rs . 90 , d ) rs . 95 , e ) none of these

Ex Output:
b


Ex Input:
Problem: if it takes a machine 4 ⁄ 5 minute to produce one item , how many items will it produce in 2 hours ? 
Options: a ) 1 ⁄ 3 , b ) 150 , c ) 80 , d ) 120 , e ) 180

Ex Output:

b