In this task, you need to provide the correct option for a given problem from the provided options.

Example Input: Problem: income and expenditure of a person are in the ratio 5 : 4 . if the income of the person is rs . 15000 , then find his savings ? 
Options: a ) 3600 , b ) 3607 , c ) 3608 , d ) 3602 , e ) 3000
Example Output: e

Example Input: Problem: pencils , pens and exercise books in a shop are in the ratio of 10 : 2 : 3 . if there are 120 pencils , the number of exercise books in the shop is : 
Options: a ) 26 , b ) 36 , c ) 46 , d ) 56 , e ) 66
Example Output: b

Example Input: Problem: what is the characteristic of the logarithm of 0.0000134 ? 
Options: a ) 5 , b ) - 5 , c ) 6 , d ) - 6 , e ) 7
Example Output:
b