All roses are flowers. Some flowers are red. Which of the following is a valid conclusion?
Correct: B
The middle term 'flowers' is distributed in the first premise (All R are F) but undistributed in the second premise (Some F are R). This commits the fallacy of the undistributed middle. We cannot conclude anything definite about roses and redness. 'Some roses are red' is not guaranteed because the red flowers may not be roses. The syllogism is invalid.