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

Example Input: Problem: the monthly incomes of a and b are in the ratio 5 : 2 . b ' s monthly income is 12 % more than c ' s monthly income . if c ' s monthly income is rs . 17000 , then find the annual income of a ? 
Options: a ) rs . 571200 , b ) rs . 180000 , c ) rs . 201600 , d ) rs . 504000 , e ) none of these
Example Output: a

Example Input: Problem: in a class of boys and girls vikas ' s rank is 9 th and tanvi ' s rank is 17 th . vikas ' s rank among the boys in that class is 4 th from the top and 18 th from the bottom and tanvi ' s rank among the girls is 8 th from top and 21 st from bottom . in the order of rank , how many girls are there between tanvi and vikas ? 
Options: a ) 29 , b ) 8 , c ) 2 , d ) 4 , e ) 6
Example Output: c

Example Input: Problem: ratio between rahul and deepak is 4 : 3 , after 6 years rahul age will be 22 years . what is deepak present age ? 
Options: a ) 22 , b ) 15 , c ) 77 , d ) 266 , e ) 12
Example Output:
e