Philosophy is broadly divided into several main branches.
Epistemology is the branch of philosophy concerned with the theory of knowledge.
It investigates the origin, nature, methods, and limits of human knowledge.
It seeks to answer questions like What is knowledge?, How is knowledge acquired?, and What do people know?.
Axiology is the branch that deals with values (A). Ethics is the branch that deals with morals (B). Social philosophy deals with society (C).