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 . 17000 , then find his savings ?
Options: a ) 3600 , b ) 3400 , c ) 3608 , d ) 3602 , e ) 3603
Example Output: b

Example Input: Problem: if x and y are both odd prime numbers and x < y , how many distinct positive integer factors does 2 xy have ?
Options: a ) 3 , b ) 4 , c ) 6 , d ) 8 , e ) 12
Example Output: d

Example Input: Problem: 180 college students were asked in a survey if they preferred windows or mac brand computers . 50 students claimed that they preferred mac to windows brand computers . one third as many of the students who preferred mac to windows , equally preferred both brands . 60 of the students had no preference . how many of the students in the survey preferred windows to mac brand computers ?
Options: a ) 25 , b ) 70 , c ) 50 , d ) 60 , e ) 75
Example Output:
b