Directions: The paragraph below can be formed by four sentences (S1 - S4). S1 and S4 are given. From the options (P, Q, R), choose two sentences which can be used as S2 and S3, respectively.

S1: Tea processing is the method in which the leaves from the tea plant are transformed into dried leaves. P: The categories of tea are distinguished by processing they undergo. Q: Cultivation of tea involves various processes. R: After being distinguished, the leaves are oxidised. S4: After oxidation, tea is formed and moisture from the leaves in removed.