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A compound has vapour density 29. On warming with a solution of iodine in alkali, it gives a yellow precipitate, the compound is---- 1. CH3CH2CHO 2. CH3COCH3 3. CH3CHOHCH3 4. CH2CH2CH2Br

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I_{2}

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C H_{3} C O C H_{3}

C H_{3} - C | C H_{3} H O H

C H_{3} O H

Which of the above compound(s) on being warmed with iodine solution and

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