What is the ruling on a Muslim woman uncovering her body for training in front of male medical students, and is it obligatory to remove the non-Muslim (Hindu) student if he is among them?

It is not permissible for a woman to expose her 'awrah for treatment unless there is a necessity, such as the unavailability of a female doctor. It is permissible for Muslim student trainees to view the 'awrah for educational necessity, in order to provide a sufficient number of Muslim doctors. However, it is absolutely impermissible to allow a non-Muslim student to view the 'awrah of a Muslim woman.