Which of the following is NOT a type of rock?

a. igneous

c. sedimentary

b. endomorphic

d. metamorphic

Endomorphic by definition is having a rounded body built often with a marked tendency to become fat and therefore is not a rock. Igneous rocks are formed from cooled hot rocks. Sedimentary are the rocks from the bottom of the water while metamorphic rocks is rock resulting from pressure and heat.