Which of the following does the Qur'an consider an unpardonable sin?
Q1. Which of the following does the Qur'an consider an unpardonable sin?
Answer: Shirk
Explanation: Shirk (associating partners with Allah) is the only sin declared unforgivable in the Quran (4:48): "Indeed, Allah does not forgive association with Him, but He forgives what is less than that for whom He wills."