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

Example Input: Problem: if a student loses 5 kilograms , he will weigh twice as much as his sister . together they now weigh 104 kilograms . what is the student ' s present weight in kilograms ? 
Options: a ) 70 , b ) 71 , c ) 72 , d ) 73 , e ) 74
Example Output: b

Example Input: Problem: what is the square root of 5,625 ? 
Options: a ) a ) 18 , b ) b ) 75 , c ) c ) 45 , d ) d ) 62 , e ) e ) 81
Example Output: b

Example Input: Problem: at the faculty of aerospace engineering , 310 students study random - processing methods , 232 students study scramjet rocket engines and 112 students study them both . if every student in the faculty has to study one of the two subjects , how many students are there in the faculty of aerospace engineering ? 
Options: a ) 430 , b ) 432 , c ) 440 , d ) 442 , e ) 446
Example Output:
a