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Statements: All fish are tortoise. No tortoise is a crocodile. Conclusions: No crocodile is a fish. No fish is a crocodile.

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Correct Answer: Both I and II follow

Explanation:

Since both the premises are universal and one premise is negative, the conclusion must be universal negative. Also, the conclusion should not contain the middle term. So, II follows; I is the converse of II and thus it also holds.

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