" Which of the following will give positive iodoform test? "

Which of the following pairs gives positive iodoform test ?

Which of the following alcohol give positive iodoform test ?

Which of the following will not give the iodoform test?

Which of the following give positive iodoform test ? (1) Ethanol, (2) Ethanal (3) Butan-1-ol, (4) Butan-2-ol (5) Phenyl ethanol.

Which of the following compound will give positive iodoform test ?