Which of the following is a vic-Dihalide?

1. Dichloromethane

2. 1,2-Dichloroethane

3. Ethylidene chloride

4. Allyl chloride

Chloretone, used as a drug, is prepared by the reaction of acetone with:

1. Chlorine

2. Ethyl chloride

3. Chloroform

4. Ethylene dichloride