Separation of Substances

You might have observed the preparation of ghee from butter
and cream at home. Which method(s) can be used to separate
ghee from the residue?
(i) Evaporation
(ii) Decantation
(iii) Filtration
(iv) Churning
Which of the following combination is the correct answer?
(a) (i) and (ii) (b) (ii) and (iii)
(c) (ii) and (iv) (d) (iv) only