If $A = \{1, 2, 3, 4\}$ and $B = \{a, b\}$,then the Cartesian product $A \times B$ is:
- A$\{(a, 1), (3, b)\}$
- B$\{(a, 2), (4, b)\}$
- C$\{(1, a), (1, b), (2, a), (2, b), (3, a), (3, b), (4, a), (4, b)\}$
- DNone of these
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