The correct answer is: Neither I nor II follows.
The first statement is “All men are dogs.” This means that every member of the set of men is also a member of the set of dogs. The second statement is “All dogs are cats.” This means that every member of the set of dogs is also a member of the set of cats.
The first conclusion is “All men are cats.” This conclusion is not valid. The reason is that the first statement only says that every member of the set of men is also a member of the set of dogs. It does not say that every member of the set of dogs is also a member of the set of men. Therefore, we cannot conclude that all men are cats.
The second conclusion is “All cats are men.” This conclusion is also not valid. The reason is that the second statement only says that every member of the set of dogs is also a member of the set of cats. It does not say that every member of the set of cats is also a member of the set of dogs. Therefore, we cannot conclude that all cats are men.
In conclusion, neither conclusion I nor conclusion II follows from the given statements.