Which of these statements are correct

(A) Yogic exercises where the aim is to control breathing is known as Pranayama

(B) Nagarjuna mentions that transformation of prakrti (substance) by use of Osadhi and Samadhi

(C) Patanjali in Yogasutra states that siddhi can be attained by the application of a herb

(D) Megasthenes also mentions that some form of medicine was practiced by ascetic sects

(E) Sushrut was related to astronomy

Choose the most appropriate answer from the options given below: