Component A dissolves in component B to form a liquid mixture. If this mixture is subjected to a process C, then only component A can be recovered. But if this mixture is subjected to another process D, then both the components A and B can be recovered from their mixture.

(a) Name one component which could be like A.
(b) Give one example of a component like B.
(c) Name the process C.
(d) What could process D be?