Solution:All three statements regarding medicine and related practices in Medieval India are correct.Unani-tibb or Unani Medicine is a tradition of Graeco-Arabic medicine based on the teachings of Greek physician Hippocrates and Roman physician Galen. It developed into an elaborate medical system in middle age era by Arabian and Persian physicians.
Unani medicine first arrived in India around 12th or 13th century with establishment of Delhi Sultanate (1206-1527) and Islamic rule over North India and subsequently flourished under Mughal Empire.
Hence, statement 1 is correct.
Harvey's discovery of the circulation of the blood was explained to a scholarly noble by European traveller Francois Bernier. Hence statement 2 is correct.
The practice of smallpox inoculation was described in contemporary Yunani and Ayurvedic texts. Hence, statement 3 is correct.