887 - Logical Reasoning

Question: All German philosphers, except for Marx, are idealists.
From which of the following can the statement above be most properly inferred?

1. Except for Marx, if someone is an idealist philosopher, then he or she is German.
2. Marx is the only non-German philosopher who is an idealist.
3. If a German is an idealist, then he or she is a philosopher, as long as he or she is not Marx.
4. Marx is not an idealist German philosopher.
5. Aside from the philosopher Marx, if someone is a German, then he or she is an idealist.