Which of the following is not connected or involved with contact metamorphism?

A. asteroids B. Mylonites C. impactiles D. coesite

Contact metamorphism is the process of forming metamorphous rocks. One type of this process os asteroid impacts in which heat and pressure breaks the rock beneath the surface melting and vaporizing large quantities of rock. Products are called impactiles. One example is coesite. Mylonites are rocks formed from another type of metamophism which is Cataclastic Metamorphism. Hence answer is B. Mylonites.