In each of the questions below are given three statements followed by four conclusions A, B, C and D. 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.
St. I Some birds are insects.
St. II All birds are butterflies.
St. III All insects are frogs.
Con A Some frogs are birds.
Con B Some butterflies are insects.
Con C Some frogs are butterflies.
Con D Some insects are birds.