Which of the following gives a negative iodof | vedclass

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(B) The iodoform test is positive for compounds containing the $CH_3-CO-$ group or the $CH_3-CH(OH)-$ group. $1.$ $CH_3-CH_2-OH$ (Ethanol) contains th

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$CH_3-CH_2-CH_2-OH$

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(B) The iodoform test is positive for compounds containing the $CH_3-CO-$ group or the $CH_3-CH(OH)-$ group. $1.$ $CH_3-CH_2-OH$ (Ethanol) contains the $CH_3-CH(OH)-$ group,so it gives a positive test. $2.$ $CH_3-CH_2-CH_2-OH$ ($1$-Propanol) does not contain the $CH_3-CH(OH)-$ group,so it gives a negative test. $3.$ $C_6H_5-CH(OH)-CH_3$ ($1$-Phenylethanol) contains the $CH_3-CH(OH)-$ group,so it gives a positive test. $4.$ $CH_3-CH(OH)-CH_3$ ($2$-Propanol) contains the $CH_3-CH(OH)-$ group,so it gives a positive test.

Which of the following gives a negative iodoform test?

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