The correct option is C Mullerian Mimicry
The monarch and viceroy butterfly are poisonous in nature. The bright red and black colour on them indicates their poisonous nature to predators. This kind of mimicry is called as Mullerian Mimicry. In Mullerian Mimicry, the organisms that mimic each other are dangerous and sometimes venomous. They both co-adapt a warning mechanism for potential predators.