Which of the following are examples of the null set?
Set of odd natural numbers divisible by 2.
Natural numbers = 1, 2, 3, 4, 5,…
Odd Natural numbers = 1, 3, 5, 7, 9, 11, …
No odd natural number is divisible by 2.
∴ no elements in this set
∴ It is a null set.