Answer- C
Every year on February 11, World Unani Day is observed to celebrate the birth anniversary of Hakim Ajmal Khan, a renowned Unani scholar and social reformer.
He is considered the pioneer of Unani medicine in India and the day honors his contribution to the development of Unani medicine not only in India but across the globe.
Apart from being an educator, Hakim Ajmal Khan was a Unani physician and the founder of scientific study in the Unani system of medicine. He was born on February 11, 1868.