⟩ 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
Ans : D
