Which of these is not a Metamorphic rock?

A. Quartzite
B. Slate
C. Gneiss
D. Schist
E. Diorite ✓

All f the above are Metamorphic rocks while Diorite is the name used for a group of coarse-grained igneous rocks with a composition between that of granite and basalt. It usually occurs as large intrusions, dikes, and sills within continental crust. These often form above a convergent plate boundary where an oceanic plate subducts beneath a continental plate.