In this task, you need to provide the correct option for a given problem from the provided options.
Q: Problem: in a group of 100 cars , 49 cars do not have air conditioning . if at least 51 cars have racing stripes , what is the greatest number of cars that could have air conditioning but not racing stripes ?
Options: a ) 49 , b ) 47 , c ) 48 , d ) 51 , e ) 53
A:
a