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Let A={1,2,3,4},B={5,6,7} and f={( 1,6),...

Let `A={1,2,3,4},B={5,6,7}` and `f={( 1,6),(2,7),(3,5),(4,6)}`. The f is :

A

one-one but not onto

B

onto but not one-one

C

both one-one and onto

D

neither one-one nor onto

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