Iodination

Q. Sample of 2, 3-dibromo-3-methylpentane is heated with zinc dust. The resulting product is isolated and heated with HI in the presence of phosphorus. Indicate which is the structure that represent the final organic product formed in the reaction

1. 
2. 
3. 
4. 

Q. Grignard reagent gives alkane with:

1. $C_2{H}_{5}OH$
2. $HOH$
3. $N{H}_3$
4. $C_2{H}_{5}N{H}_2$