In each of the questions below, four statements are given followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.
Statements
All sharks are fishes.
Some fishes are birds.
All birds are trees.
All trees are insects.
Conclusions
I. Some insects are sharks.
II. Some sharks are trees.
III. All insects are birds.
IV. Some birds are sharks.