A.
anwered by: canteau
Mountain and road bikes use the same cassette to hub interface, so the Shimano HG-41 cassette will fit on a wheel that has a Shimano compatible hub.
The bigger issue will be the capacity of the rear derailleur. Road rear derailleurs are commonly designed to work with cassettes up to 28t. Some of the newer road rear derailleurs do offer a climbing version option that increases the capacity to 36t or more.
You will want to make sure that you get a cassette that is designed to work within the limits of your derailleur.