Pramana is an epistemological term used in Indian philosophies to describe the methods by which a person receives correct and legitimate knowledge of the world.Concepts in Nyaya philosophyDescriptionVyaptiVyapti is said to be the source of inferences.vyapti denotes the understanding of an invariable causal relationship between sadhya and hetu.AnumanaAnuman is the ability to recognize an object based on prior knowledge of a sign or mark.Inferential knowledge is obtained through the use of other knowledge rather than direct perception.PratyakshaAccording to Nyaya School , direct and immediate cognition is formed by the contact of the object with the sense organs.Perception is the root of all other pramanas since it provides direct or instantaneous knowledge of an object's actuality.UpamanaUpamana is the process of gaining knowledge by distinguishing it from simple inference.Upamana refers to information that is imparted by analogy.Thus, A-IV, B - III, C - I, D - II is correct matching.