Instructions: In this task, you need to provide the correct option for a given problem from the provided options.
Input: Problem: the triplicate ratio of 1 : 3 is ? 
Options: a ) 1 : 27 , b ) 1 : 8 , c ) 1 : 3 , d ) 1 : 1 , e ) 1 : 2
Output:
a