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

[Q]: 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
[A]: b


[Q]: Problem: two numbers are in the ratio of 5 : 8 . if 30 be subtracted from each , they are in the ratio of 5 : 9 . find the numbers ? 
Options: a ) 122,195 , b ) 121,199 , c ) 120,192 , d ) 102,192 , e ) 126,109
[A]: c


[Q]: Problem: the simple form of the ratio 4 / 3 : 4 / 5 is ? 
Options: a ) 10 : 6 , b ) 10 : 3 , c ) 15 : 3 , d ) 5 : 3 , e ) 30 : 3
[A]:
d