Concept:Imam Mālik ibn Anas, the compiler of the Muwatta', was the leading scholar of Madīnah.
Explanation:The Muwatta' is one of the earliest and most respected collections of Hadīth and Islamic jurisprudence.
It was authored by Imam Mālik ibn Anas, who lived in Madīnah.
Madīnah is historically known as Dārul-Hijrah because it is the city to which the Prophet Muhammad (SAW) migrated.
Imam Mālik spent his entire life in Madīnah and became its chief legal authority.
Due to this deep connection, he was honoured with the title "Imām of Dārul-Hijrah."
He was never the Imām of Baghdad, Damascus, or Makkah in this context.
Therefore, Dārul-Hijrah is the correct title associated with him.
Answer:A. Dārul-Hijrah