Al-Qanun fi at-tib is an encyclopaedia of medicine in five books written by:

A. Ibn e Hazm
B. Avicenna 
C. Jarir Al Tabari
D. Al Mozhan

🧠 Explanation:

Avicenna wrote Al-Qanun fi al-Tibb, a five-book medical encyclopedia. Studied in history and science, it shaped modern medicine. In Pakistan, it’s important for learning about medical history, inspiring doctors and students to advance healthcare practices and research.