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Home » All A are B. All B are C. No C is D. Which conclusion follows?

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All A are B. All B are C. No C is D. Which conclusion follows?

A. No A is D ✅
B. All A is D
C. Some A is D
D. None of these

Explanation

  • A is a subset of B, and B is a subset of C, so A is a subset of C
  • Since no C is D, and A is entirely within C, no A can be D