Banking Exams Reasoning — Question 1837
Question
Statements: All keys are locks. Some locks are doors. Conclusions: I. Some keys are doors. II. No key is a door. Which conclusion(s) follow?
- Only I follows
- Only II follows
- Either I or II follows
- Both I and II follow
Correct answer
C — Either I or II follows
Explanation (English)
The relation between keys and doors is undetermined: some keys could be doors, or none could be. Conclusions I and II are exhaustive and mutually exclusive, so they form a complementary pair. Either I or II follows.
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