Question

The cardinality of the set $P\{P[P(\varphi )]\}$ is

• A. 0
• B. 1
• C. 2
• D. 4

Answer 1

Answer: (D)

$P(\varphi )$ is the power set of the set $\varphi$.
$\therefore$ Cardinality $=P\{P[P(\varphi )]\}=4$