Question: a. Is 3 {1, 2, 3}? b. Is 1 {1}? c. Is {2}{1,{2},{3}}? d. Is {1}{1,{2}}?

a. Is 3 {1, 2, 3}?
b. Is 1 {1}?
c. Is {2}{1,{2},{3}}?
d. Is {1}{1,{2}}?

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