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: 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

Output: d


Input: Consider Input: Problem: there are two cars . one is 60 miles north of the other . simultaneously , the car to the north is driven westward at 15 miles per hour and the other car is driven eastward at 25 miles per hour . how many miles apart are the cars after 2 hours ? 
Options: a ) 60 , b ) 80 , c ) 100 , d ) 120 , e ) 140

Output: c


Input: Consider Input: Problem: the speed of the boat in still water in 12 kmph . it can travel downstream through 39 kms in 3 hrs . in what time would it cover the same distance upstream ? 
Options: a ) 3.5 hours , b ) 6 hours , c ) 4 hours , d ) 5 hours , e ) 6 hours


Output: a