Let A={1,2}A = \{1, 2\}A={1,2}. Which of the following is the power set P(A)\mathcal{P}(A)P(A)?
{∅,{1},{2}}\{\emptyset, \{1\}, \{2\}\}{∅,{1},{2}}
{{1},{2},{1,2}}\{\{1\}, \{2\}, \{1, 2\}\}{{1},{2},{1,2}}
{∅,{1},{2},{1,2}}\{\emptyset, \{1\}, \{2\}, \{1, 2\}\}{∅,{1},{2},{1,2}}
{1,2,{1,2}}\{1, 2, \{1, 2\}\}{1,2,{1,2}}