Which of the following statements is true? I. Aldehydes and ketones both contain a hydroxyl group. II. The names for aldehydes and ketones are derived from the name of the longest carbon chain that contains the carbonyl group. III. The aldehyde and ketone with a molecular formula of C3H6O are constitutional isomers. IV. 2-Propanone is immiscible in water. A. I & II B. II & II C. I & III D. I & IV 2. Whicb of the following is the correct IUPAC name of the structure below?

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