Be honest. I would avoid saying "No answer", as it has a lot of connotations. You either finished it or you didn't. They can see your application, it's just a general overview. You technically should've completed the pre-med prereqs. (The required ones.) The Math and Spanish ones, I'd be honest about. Maybe that's just me. I may finish a year of Spanish for example, but I said No as I have not gone about doing it. Should I not do it, I'd be dubbed a liar. Also, UCLA is famous for giving an interview partially in Spanish if you say you're fluent, but I don't think they ask that anywhere really, so I'm assuming its the Yes in Spanish. If you're honest, you can't go wrong. I don't think they would've let you fill out a secondary (since it IS screened) if you weren't going to fulfill the pre-med requirements.