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

[EX Q]: Problem: if 0.4 of a number is equal to 0.06 of another number , the ratio of the numbers i 
Options: a ) 2 : 3 , b ) 3 : 4 , c ) 3 : 20 , d ) 20 : 3 , e ) none
[EX A]: c

[EX Q]: Problem: the sub - duplicate ratio of 9 : 25 is 
Options: a ) 4 : 3 , b ) 1 : 2 , c ) 3 : 5 , d ) 1 : 4 , e ) 2 : 3
[EX A]: c

[EX Q]: Problem: two numbers are in the ratio of 15 : 11 . if their h . c . f . is 13 , find the numbers . 
Options: a ) 195,143 , b ) 185,133 , c ) 175,123 , d ) 165,113 , e ) none of them
[EX A]:
a