Dehalogenation of Vicinal Dihalide

Q. For the given reaction :


Which of the following correctly represents (A) and (B)?

1. (A) is $Zn/Zndust$ , and (B) is 1-bromopropane.
2. (A) is $Zn/Zndust$ , and (B) is propene.
3. (A) is $ZnO$ , and (B) is 1-bromopropane.
4. (A) is $ZnO$ , and (B) is propyne.

Q. A sample of 2, 3-dibromo-3-methylpentane is heated with zinc dust. Identify which is the structure that represents the organic product formed in the reaction.

1. 
2. 
3. 
4.