Q: In this task, you need to provide the correct option for a given problem from the provided options.
Problem: in a certain school , the ratio of boys to girls is 5 to 13 . if there are 80 more girls than boys , how many boys are there ? 
Options: a ) 27 , b ) 36 , c ) 45 , d ) 50 , e ) 117
A:
d