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Statements: All the locks are keys. All the keys are bats. Some watches are bats.

Conclusions:

1. Some bats are locks.

2. Some watches are keys.

3. All the keys are locks.

  • A.Only (1) and (2)
  • B.Only (1)
  • C.Only (2)
  • D.Only (1) and (3)

Answer: B

Correct answer: Only (1)

All locks are keys and all keys are bats, so all locks are bats - and therefore some bats are locks, conclusion 1. Conclusion 2 needs the bats that are watches to be keys, which is not given, and conclusion 3 reverses a universal.

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