Your interviewers are curious about how committed you are to your career path of choice and whether you've thoroughly thought through all your options if you're not admitted into Temple's School of Dentistry. Show you possess the determination to pursue a degree in dentistry that goes deeper than being accepted in their school. If the question asks what you would do if you're not accepted in any dental school this round, show you'd consider a different path in the meantime, such as taking a gap year and getting a head start on your studies, exploring a business degree for opening your own practice, exploring dental hygiene, or dental/medical sales, for instance. Ultimately, assure them rejection won't stop you! If you're truly determined to succeed, then you're no quitter, and that's part of what this question aims to determine, whether you'd see your degree through or drop out. Whatever the path you would choose, show your interviewers that you have the commitment, confidence, and drive necessary to succeed. Doing so will increase your chances of acceptance.