What are the main processes for separating heterogeneous mixtures? I - Filtration II - Fractional dissolution III - Magnetic separation IV - Flota...

What are the main processes for separating heterogeneous mixtures?

I - Filtration
II - Fractional dissolution
III - Magnetic separation
IV - Flotation
V - Fractional fusion
VI - Levigation
VII - Ventilation
VIII - Sieving or sifting
IX - Decantation
a) I, II, III and IV are correct.
b) V, VI, VII and VIII are correct.
c) I, III, IV and IX are correct.
d) I, IV, VI and IX are correct.