Three statements are given, followed by four conclusions numbered I, II, III, and IV.
Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
All birds are ducks.
Some ducks are crows.
All crows are parrots.
Conclusions:
I. Some parrots are birds.
II. Some parrots are ducks.
III. Some crows are birds.
IV. All parrots are birds.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Only conclusion II follows.
Conclusions:
I. Some parrots are birds - Does not follow (It is possible but not definite)
II. Some parrots are ducks - Follows (Some ducks are crows, and all crows are parrots, so some parrots that are crows are also ducks)
III. Some crows are birds - Does not follow (It is possible but not definite)
IV. All parrots are birds - Does not follow (It is possible but not definite)