Step 1: Understanding the question.
The question tests validity of conclusions from given statements in syllogism. Step 2: Analyzing the options.
All roses are flowers (universal), some flowers are red (particular). Conclusion I: Some roses are red — possible but not necessarily true. Conclusion II: All flowers are roses — clearly false (reverses universal). (A) Only I follows: Incorrect. (B) Only II follows: Incorrect. (C) Both I and II follow: Incorrect. (D) Neither I nor II follows: Correct — Neither is definitively true. Step 3: Conclusion.
The correct answer is (D) Neither I nor II follows, as no conclusion is necessarily true.