Concept:In Nyāya philosophy, Pramā means valid or correct knowledge that exactly corresponds to the true nature of an object. The term "Yathartha" refers to that reality‑based cognition.Explanation:Nyāya defines Pramā as knowledge that is free from error and matches the object as it is. Among the four options, only Yathartha (truth or reality) meets this condition. Smṛti (memory) is mere recollection and may be incorrect. Saṃśaya (doubt) indicates uncertainty, not valid knowledge. Vikalpa (imagination) creates mental images that may not match reality. Hence, Pramā is not any of these. Pramā arises from a valid pramāṇa (means of knowledge) such as perception, inference, comparison, or verbal testimony. Any cognition that does not correspond to reality is called apramā (invalid knowledge). Therefore, Pramā is correctly identified as Yathartha.Answer:Yathartha (Option D)