565 - Logical Reasoning

No national productivity measures are available for underground industries that may exist but remain unreported. On the other hand, at least some industries that are run entirely by self-employed industrialists are included in national productivity measures.
From the information given above, it can be validly concluded that

1. there are at least some industries run entirely by self-employed industrialists that are underground industries
2. no industries that are run entirely by self-employed industrialists operate underground
3. there are at least some industries other than those run entirely by self-employed industrialists that are underground industries
4. there are at least some industries run entirely by self-employed industrialists that are not underground industries
5. there are at least some underground industries for which national productivity measures are available