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'.

Input: Consider Input: Problem: a train overtakes two person who are walking in the same direction in which the train is going , at the rate of 2 kmph and 4 kmph and passes them completely in 9 and 10 seconds respectively . the length of the train is : 
Options: a ) 45 m , b ) 50 m , c ) 54 m , d ) 72 m , e ) none of these

Output: b


Input: Consider Input: Problem: a company produces 72000 bottles of water everyday . if a case can hold 10 bottles of water . how many cases are required by the company to hold its one day production 
Options: a ) 2000 , b ) 4500 , c ) 5000 , d ) 7200 , e ) 9000

Output: d


Input: Consider Input: Problem: a 1200 m long train crosses a tree in 120 sec , how much time will i take to pass a platform 1200 m long ? 
Options: a ) 200 sec , b ) 240 sec , c ) 167 sec , d ) 197 sec , e ) 179 sec


Output: b