Multiple choice question II — task. Mathematics State Board, Class 10.

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Let

$A = \{1, 2, 3, 4\}$ and

$B = \{4, 8, 9, 10\}$ . A function

$f : A \rightarrow B$ given by

$f = \{(1, 4), (2, 8), (3, 9), (4, 10)\}$ is a:

Identity function
Into function
Many-one function
One-to-one function

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