Question

Which of the following represents a null set

Answer 1

Answer:

I think b is the answer b ...............

Answer 2

Answer:

option D

Step-by-step explanation:

Null set is a set, in which there is no value

here ,

1) A={7}

2) B={3}

3) C={3}

4) D= nil , as square of no natural number is less than zero

so answer is option D