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Statements: No mouse is rat. All mouse are black. Conclusion: I. All black are rat. II. Some rat are mouse.

Statements: No mouse is rat. All mouse are black. Conclusion: I. All black are rat. II. Some rat are mouse. Correct Answer None follows.

The least possible Venn diagram for the given statements is as follows,

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Conclusion:

I. All black are rat → False (All mouse are black and no mouse are rat then, those mouse who is black is not rat)

II. Some rat are mouse → False (No mouse is rat so no rat is mouse)

Thus, none follows.

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