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Power set of {1, 2, 3} has:

A6
B∞
C3
D8 (= 2³; 2ⁿ subsets for n elements)
Answer & Solution
Correct answer: D. 8 (= 2³; 2ⁿ subsets for n elements)
P(A) = set of all subsets. For |A| = n: |P(A)| = 2^n. For {1,2,3}: 2³ = 8 (including ∅ and full set).
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