I encountered a weird question in an exam  . The statement says instead of radical substitution cyclopropane undergoes electrophilic addition reaction to sunlight.

I have always known that all saturated compounds give substitution reactions in sunlight but the answer key claims this statement to be true.

I didnt find any source to prove this. Any help with explanation and a verified source would be appreciated.

I encountered a weird question in an exam. The statement says that instead of radical substitution, cyclopropane undergoes electrophilic addition reaction in sunlight.

I know that all saturated compounds give substitution reactions in sunlight but the answer key states that electrophilic addition takes place.

I couldn't find any source to prove this. Any help with an explanation and a verified source would be appreciated.