Fill in the blanks.
(i) The opposite sides of a parallelogram are `ul(P) and ul(Q)`
(ii) A quadrilateral having only one pair of opposite sides parallel is called a `ul(R)`
(iii) A parallelogram having all the sides equal is called a `ul(S)`.

Options

A. `{:(P,Q,R,S),("equal"," parallel"," rectangle"," rhombus "):}`
B. `{:(P,Q,R,S),("equal"," non-parallel","trapezium","kite"):}`
C. `{:(P,Q,R,S),("equal"," parallel","trapezium" ,"rhombus"):}`
D. `{:(P,Q,R,S),("equal"," parallel"," trapezium"," kite"):}`

Explanation

To fill in the blanks, we need to identify the correct terms based on the properties of shapes mentioned in the question. Let's solve it step by step.

### Step-by-Step Solution:

1. **Identify the Opposite Sides of a Parallelogram:**
- In a parallelogram, the opposite sides are equal and parallel. Let's denote these sides as `P` and `Q`.
- Therefore, the answer for (i) is: **P and Q**.

2. **Identify the Type of Quadrilateral with One Pair of Opposite Sides Parallel:**
- A quadrilateral that has only one pair of opposite sides parallel is known as a trapezium.
- Therefore, the answer for (ii) is: **Trapezium**.

3. **Identify the Type of Parallelogram with All Sides Equal:**
- A parallelogram where all sides are equal is called a rhombus.
- Therefore, the answer for (iii) is: **Rhombus**.

### Final Answers:
(i) P and Q
(ii) Trapezium
(iii) Rhombus