Is there a relevant distinction between "who" and "whom"?
Is this sentence wrong?
- Whom of you will go to his concerts?
whom is only used as an object, whereas who is always used where a subject is required. In other words, whom may be thought of as being similar to us, them, etc, whereas who may be thought of as being similar to we, they, etc. (http://en.wiktionary.org/wiki/whom)
To answer your question I think only "which" and "who" are correct in this case while "whom" shouldn't be. "Who" was marked correct when I translated this sentence.