Application of Derivatives

Let R denote the set of all real numbers. For a real number x, let [x] denote the greatest integer less than or equal to x. Let n denote a natural number. Match each entry in List-I to the correct entry in List-II and choose the correct option.

1. (P) → (1), (Q) → (3), (R) → (2), (S) → (5)
2. (P) → (2), (Q) → (1), (R) → (4), (S) → (3)
3. (P) → (5), (Q) → (1), (R) → (4), (S) → (3)
4. (P) → (2), (Q) → (3), (R) → (1), (S) → (5)