Cyclists are exempt from wearing a helmet when riding...

Cyclists are exempt from wearing a helmet when riding...
A)on interurban roads.
B)on downhill slopes.
C)in extreme heat conditions.Correct
Cyclists are required to wear a helmet when riding on interurban roads, but are exempt on steep climbs and in extreme heat conditions.
In the case of those under 16 years of age, they are required to wear it both when riding on urban and interurban roads.
It is likewise recommended that everyone always wears one, even in built-up areas, as the helmet is a very important passive safety element.