I'm a Non-trad with thousands of pt contact hours as a 911 EMT, hundreds of volunteer and research hours with an NIH grant to boot. Asking someone if their URM is offensive. It suggests that their stats (personal accomplishments) aren't enough to have gotten their foot in the door without factoring in their skin color. So if you hadn't guessed I am URM and I do actually find that rude. A better question would have been "what are your extracurriculars?" ...but if you're upset you didn't get an interview and need to blame it on my skin color, that's fine too.