Among the following,the one that gives a positive iodoform test upon reaction with $I_2$ and $NaOH$ is

• A
  $CH_3-CH(CH_3)-CH_2OH$
• B
  $C_6H_5-CH(OH)-CH_3$
• C
  $CH_3-CH_2-CH(OH)-CH_2-CH_3$
• D
  $C_6H_5-CH_2OH$