I don't even remember what b.s. I used to respond to that question, but again; it's not so much what you say, but how you say it. If you give the impression you believe in whatever it is you say, they'll believe in you.
Really, the interviewer just wanted to have a conversation about ethics codes. There wasn't an expected answer but, it was unsettling to launch into an unrelated conversation as the start of the "interview".