how to provide option in installer to choose one out of two windows services to install?

Question

Hi,
We have two windows services. We need to create an installer which gives the option to install either of the services.
Example:
Two services are WindowsServiceA and WindowsServiceB.
We need to create an Installer. This installer should give option to the user to install either WindowsServiceA or WindowsServiceB
I would be thankful if anyone provides help in doing this(in .net).