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JEE MATHEMATICS MCQ: FUNCTIONS

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Let A={1,2,3}  and  B={2,3,4}A = \left\{ {1,2,3} \right\}\;and\;B = \left\{ {2,3,4} \right\} then which of the following relations is a function from A  to  B?A\;to\;B?
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Correct option: C
{(1,3),(2,3),(3,3)}\left\{ {\left( {1,\mathrm{ }3} \right),\mathrm{ }\left( {2,\mathrm{ }3} \right),\mathrm{ }\left( {3,\mathrm{ }3} \right)} \right\}
Option C ({(1,3),(2,3),(3,3)}\{(1, 3), (2, 3), (3, 3)\}) is correct because each element in A is mapped to a unique element in B, satisfying the definition of a function.

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