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 If A={ϕ,{ϕ}}, then the power set of A is 

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a
A
b
{ϕ,{ϕ},A}
c
{ϕ,{ϕ},{{ϕ}},A}
d
None of these

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detailed solution

Correct option is C

Power set of A={ϕ,{ϕ},{{ϕ}},A}

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