Not entirely DC related but it does involve Conan. Simple Who is the smartest of these three. Conan Edogawa/Shinichi Kudo (Need I have to say?), Gregory House (House M.D.), or Adrian Monk (Monk). Also there is a forth option and that would be other, if you think there are others that are smarter please specify.
Actually not sure if this is supposed to be posted here or in a different spot.