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

[EX Q]: Problem: find the ratio in which rice at rs . 7.20 a kg be mixed with rice at rs . 5.70 a kg to produce a mixture worth rs . 6.30 a kg ? 
Options: a ) 1 : 3 , b ) 2 : 3 , c ) 3 : 4 , d ) 4 : 5 , e ) none of these
[EX A]: b

[EX Q]: Problem: if q and d are both integers , q > d , and - 3 q > 19 , then the largest value of d would be ? 
Options: a ) - 5 , b ) - 6 , c ) - 7 , d ) - 8 , e ) - 10
[EX A]: d

[EX Q]: Problem: income and expenditure of a person are in the ratio 9 : 8 . if the income of the person is rs . 36000 , then find his savings ? 
Options: a ) 2000 , b ) 3000 , c ) 4000 , d ) 5000 , e ) 6000
[EX A]:
c