These questions can be asked in both mmi and panel interviews and are a classic example of how interviewers test a student’s ability to apply ethical concepts.
The best way to answer these questions is to consider the four principles of medical ethics: justice, beneficence, non-maleficence and autonomy. Attempt to apply these one by one in your head and decide which ones are applicable to the question. For euthanasia related questions, all of the principles can be addressed, and spoken about. Make sure you lay out all of your arguments for both sides, using the four principles to structure your answer. You can use these as the four main points for your answer, and then base your arguments around them. Interviewers will be impressed by not only your well-supported arguments considering all aspects of the issue, but also by how methodical your thought process is. This method can generally be applied to all ethical questions.