Let A= {2, 5, 7}, B = {6, 7, 8, 9} and f...

Let `A= {2, 5, 7}`, `B = {6, 7, 8, 9}` and `f= {(2, 7), (5, 9), (7, 6)}` be a function from A to B, then f is:

A

One-one function

B

Onto function

C

Many-one function

D

None of these.

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