Which of the following gives haloform test positive

The haloform test is a chemical reaction used to detect the presence of methyl ketones (compounds with a methyl group attached to a carbonyl group) in a given substance. When a methyl ketone reacts with a strong base and an oxidizing agent (such as iodine or chlorine), it produces a haloform compound, which is a haloalkane (haloform) along with a carboxylate ion.

In the haloform test, the following compounds will give a positive result:

Acetone (propanone): CH3COCH3
Ethyl methyl ketone (2-butanone): CH3COCH2CH3
Methyl ethyl ketone (2-pentanone): CH3COCH2CH2CH3
Isopropyl methyl ketone (3-pentanone): CH3COCH(CH3)2
These compounds have a methyl ketone functional group (CH3CO-) that undergoes the haloform reaction to produce the corresponding haloform and carboxylate ions. Other compounds without a methyl ketone group will not give a positive result in the haloform test.