Concept:Al-Furqan is a title of the Qur'an that shows its role as a standard of truth.Explanation:The Arabic term "Furqan" is derived from the root meaning "to separate" or "to distinguish."The Qur'an is named al-Furqan because it separates truth from falsehood and right from wrong.Therefore, this name implies that the Qur'an is a criterion for judging matters.Answer:D. criterion