Which of the following is NOT associated with Aryabhata?

Correct option is D

Aryabhata was a famous Indian mathematician and astronomer who lived in the 5th century CE.
 He is known for his contributions to the fields of mathematics and astronomy. Among his notable achievements, he stated that day and night were caused by the rotation of the earth on its axis, developed a scientific explanation for eclipses, and found a way of calculating the circumference of a circle. However, he was not known for his contributions to the field of medicine or surgery.