Clarification on Quranic verses is achieved through
Qira'ah
Tahil
Ijtihad
Tafsir
Correct answer is D
Tafsir refers to exegesis, usually of the Quran. An author of a tafsir is a mufassir. A Quranic tafsir attempts to provide elucidation, explanation, interpretation, context, or commentary to enable a clear understanding of God's will.