Which is the correct increasing order of boiling points of the following compounds?
1-Bromoethane, 1-Bromopropane, 1-Bromobutane, Bromobenzene
1
Bromobenzene < 1-Bromobutane < 1-Bromopropane < 1-Bromoethane
2
Bromobenzene < 1-Bromoethane < 1-Bromopropane < 1-Bromobutane
3
1-Bromopropane < 1-Bromobutane < 1-Bromoethane < Bromobenzene
4
1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene