What sounds more natural to native english speaker?

Não tenho ideia.

None of the above in all honesty. I can understand them, but they aren't "natural" or something a native English speaker would say.

If you're talking about a sandwich, people would normally say "what's in the sandwich?" or "what kind of sandwich is it?" or "what are the ingredients?"

Most people would ask, "What's in it?"

1. If you are pointing to the sandwich say "this". If referring to a kind of sandwich say "it".