Which of these act as propellant fuel for ''gunpowder'' in firearms, artillery, rockets and fireworks?

what a poor question I think the usage of propellant is wrong

Check gunpowder burning chemical equation, Mendeleev periodic table and you'll see you can't exclude salpetre from propellants.

Sulphur and charcoal do nothing without saltpetre this is a very bad question simply wrong. saltpetre and charcoal will work.