Detailed Instructions: In this task, you need to provide the correct option for a given problem from the provided options.
Q: Problem: the ratio of 2 numbers is 2 : 5 and their h . c . f . is 6 . their l . c . m . is ? 
Options: a ) 20 , b ) 24 , c ) 52 , d ) 36 , e ) 60
A:
e