Which of the following are examples of the null set(i) Set of odd natural numbers divisible by 2(ii) Set of even prime numbers(iii) {x: x is a natural numbers, `x < 5`and `x > 7`}(iv) {y: y is a point common to any two parallel lines}

Explanation

To determine which of the given sets are examples of the null set (also known as the empty set), we will analyze each option step by step.

### Step 1: Analyze the first set
**Set of odd natural numbers divisible by 2.**

- Odd natural numbers are numbers like 1, 3, 5, 7, etc.
- By definition, odd numbers are not divisible by 2.
- Therefore, there are no odd natural numbers that can be divisible by 2.
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