Which of the correct increasing order of boiling points of the following compounds?
1-Iodobutane,1-Bromobutane,1-Chlorobutane, Butane
A. Butanelt1-Chlorobutanelt1-Bromobutanelt1-Iodobutane
B. 1-Iodobutanelt1-Bromobutanelt1-ChlorobutaneltButane
C. Butanelt1-Iodobutanelt1-Bromobutanelt1-Chlorobutane
D. Butanelt1-Chlorobutanelt1-Iodobutanelt1-Bromobutane