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

[EX Q]: Problem: an alloy is to contain steel and iron in the ratio 5 : 2 . the iron required to be melted with 35 kg of steel is ? 
Options: a ) 12 kg , b ) 14 kg , c ) 15 kg , d ) 20 kg , e ) 18 kg
[EX A]: b

[EX Q]: Problem: the ratio of two quantities is 7 to 12 . if each of the quantities is divided by 3 , what is the ratio of these 2 new quantities ? 
Options: a ) 3.5 : 6 , b ) 14 : 24 , c ) 7 : 12 , d ) 2.3 : 4 , e ) it can not be determined from the information given
[EX A]: c

[EX Q]: Problem: a ratio between two numbers is 3 : 4 and their l . c . m . is 180 . the first number is 
Options: a ) 60 , b ) 45 , c ) 20 , d ) 15 , e ) none
[EX A]:
b