Regarding boiling point, the correct statement is 

It regularly increases down the group in 13^th, 14^th, 17^th, and 18^th group 

Down the group, regular increase in 13^th and 14^th group whereas  regular decrease in 17^th and 18^th group 

Down the group regular decrease in 13^th and 14^th group whereas regular increase in 17^th and 18^th group 

No regular trend in any of the four groups i.e. 13^th, 14^th, 17^th and 18^th groups