Correct Answer - Option 2 : Epistemology
Ontology: It is the philosophical study dealing with the nature of being.
Epistemology: It is the philosophical field in which one studies knowledge, understanding, wisdom, justification, the ethics of belief, and various domains of knowledge, such as moral, modal, mathematical, self, and external world knowledge.
Entomology: It is the study of insects and their relationship to humans, the environment, and other organisms.
Etymology: It is the study of the origin of words and the way in which their meanings have changed throughout history.
