I think it's inappropriate for a medical school student to be wearing leggings and a crop top to class.
Do you think that students should have a dress code?
As long as it's not so ridiculously inappropriate no.
You shouldn't judge what other people wear to class. People can wear what they like if it makes them comfortable and you should just accept that.
I don't really care. I got to class.
I think it is wrong to judge what other people wear. If she is doing well in her classes then it is no concern of yours. However if it is distracting, you could always bring it up to the professor.