Ensuring that there is an informed consent on the part of the patient before a surgery is done, illustrates the bioethical principle of:

Beneficence AutonomyVeracityNon-maleficence

Explanation.

Informed consent means that the patient fully understands about the surgery, including the risks involved and the alternative solutions. In giving consent it is done with full knowledge and is given freely. The action of allowing the patient to decide whether a surgery is to be done or not exemplifies the bioethical principle of autonomy.