Given: "All Wait are Onion", "Some Wait are Shadow", and "No Shadow is Comb". Since some Wait are also Shadow, and every Wait is also an Onion, those particular elements that are both Wait and Shadow must also count as Onions.
Since no Shadow is Comb, those same elements, being Shadow, cannot be Comb either.
Putting these two facts together, at least some Onions are definitely not Comb, which validly supports "Some onion are not comb", matching option 1.