Which is the correct increasing order of boiling points of the following compounds?
1-bromoethane, 1-bromopropane , 1-bromobutane, Bromobenzene
(a) Bromobenzene < 1-bromobutane < 1-bromopropane < 1-bromoethane
(b) Bromobenzene < 1-bromoethane < 1-bromopropane < 1-bromobutane
(c) 1- bromopropane <1-bromobutane < 1- bromoethane < Bromobenzene
(d) 1-bromoethane < 1-bromopropane < 1-bromobutane < Bromobenze
(R)-2-Bromobutane is allowed to react with NaI in acetone. The product formed is :