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UP TGT Mathematics Set Theory Test Series - Part 5

For f:{1,2,3}→{a,b}, which statement is true?

Type: MCQ • Marks: 1
For f:{1,2,3}→{a,b}, which statement is true?
Options
A. f cannot be defined
B. f must be bijective
C. f must be surjective and injective
D. f cannot be injective
Explanation
Three distinct domain elements cannot map injectively into a two-element codomain.
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