Statements: All dogs are mammals. No mammal is a reptile. All snakes are reptiles.

Question

Statements: All dogs are mammals. No mammal is a reptile. All snakes are reptiles.

Conclusions:

I. No dog is a snake.

II. Some snakes are not mammals.

III. Some dogs may be snakes.

Which conclusion(s) follow?

1. A. Only Conclusion I follows
2. B. Only Conclusions I and II follow (Correct answer)
3. C. Only Conclusions II and III follow
4. D. Neither Conclusion I, II nor III follows

Correct Answer

Option B — Only Conclusions I and II follow

Detailed Solution & Explanation

The correct answer is Only Conclusions I and II follow.

Key Points

• All dogs→mammals→not reptiles.
• All snakes→reptiles→not mammals.
• Therefore: I. No dog is a snake ✓. II.
• All snakes are not mammals ✓. III is false. Only I and II follow.