Detailed Instructions: In this task, you need to provide the correct option for a given problem from the provided options.
Q: Problem: find the ratio between 1 hr 30 minutes and 2 hrs 40 minutes .
Options: a ) 9 : 16 , b ) 5 : 9 , c ) 12 : 17 , d ) 13 : 24 , e ) none of these
A:
a