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

[EX Q]: Problem: hree number are in the ratio of 3 : 4 : 5 and their l . c . m . is 2400 . their h . c . f . is : 
Options: a ) 40 , b ) 50 , c ) 60 , d ) 70 , e ) 80
[EX A]: a

[EX Q]: Problem: what is the square root of 4,624 ? 
Options: a ) a ) 18 , b ) b ) 9 , c ) c ) 68 , d ) d ) 62 , e ) e ) 81
[EX A]: c

[EX Q]: Problem: in assembling a bluetooth device , a factory uses one of two kinds of modules . one module costs $ 10 and the other one , that is cheaper , costs $ 2.5 . the factory holds a $ 62.50 worth stock of 22 modules . how many of the modules in the stock are of the cheaper kind ? 
Options: a ) 31 , b ) 35 , c ) 21 , d ) 40 , e ) 45
[EX A]:
c