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: how many plants will be there in a circular bed whose outer edge measure 32 cms , allowing 4 cm 2 for each plant ?
Options: a ) 18 , b ) 750 , c ) 24 , d ) 20 , e ) none of these

Ex Output:
d

Ex Input:
Problem: sandy walked 20 meters towards south . then sandy turned to her left and walked 25 meters . she then turned to her left and walked 20 meters . she then turned to her right and walked 30 meters . what distance is she from the starting point and in which direction ?
Options: a ) 35 m east , b ) 35 m north , c ) 30 m west , d ) 45 m west , e ) 55 m east

Ex Output:
e

Ex Input:
Problem: a person travels equal distances with speeds of 3 km / hr , 4 km / hr and 5 km / hr and takes a total time of 50 minutes . the total distance is ?
Options: a ) 1 km , b ) 2 km , c ) 3.19 km , d ) 4 km , e ) 5 km

Ex Output:
c