Newtons third law describes action and reaction forces. A table of four scenarios is provided. Scenario
Situation
A
A rocket launched into space
A balloon accelerating upward
C
A train moving at a constant speed
D
A girl circling on a carousel
Which of the scenarios described in the table show equal and opposite reaction forces?
The rocket and balloon
O
The rocket and train
The balloon and girl
The train and girl

3 hours because it is a decent distance.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.