Question

Which one of the following statements is correct ?
The power set of the null set is

• A. null set
• B. a singleton set
• C. a finite set with two or more elements
• D. $\{a^b|a\in R,b\in N\}$

Answer 1

Answer: (B)

The power set of the null set is single set as power set of $\varphi$ is $\{\varphi \}$.