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

Q: Problem: income and expenditure of a person are in the ratio 5 : 4 . if the income of the person is rs . 19000 , then find his savings ? 
Options: a ) 3800 , b ) 3607 , c ) 3608 , d ) 3602 , e ) 3603

A: a
****
Q: Problem: in a graduating class of 236 students , 144 took geometry and 119 took biology . what is the difference between the greatest possible number and the smallest possible number of students that could have taken both geometry and biology ? 
Options: a ) 144 , b ) 119 , c ) 113 , d ) 117 , e ) 31

A: d
****
Q: Problem: the compound ratio of 2 / 5 , 6 / 7 , 1 / 3 and 1 / 8 is given by ? 
Options: a ) 7 / 98 , b ) 1 / 70 , c ) 1 / 98 , d ) 1 / 96 , e ) 1 / 68

A:
b
****