Statements : Some rats are cats. Some cats are dogs. No dog is cow. Conclusions : I. No cow is cat. II. No dog is rat. III. Some cats are rats.

The correct answer is: A. None follows

The first statement, “Some rats are cats,” means that there exists at least one rat that is also a cat. The second statement, “Some cats are dogs,” means that there exists at least one cat that is also a dog. The third statement, “No dog is cow,” means that no dog is a cow.

From these statements, we can conclude that no cow is a cat, because no cow is a dog and some cats are dogs. However, we cannot conclude that no dog is a rat, because the first statement only says that some rats are