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Let f:NN to NN be defined as f(x)={(2n,...

Let `f:NN to NN` be defined as
`f(x)={(2n,if n=2,4,6 . . .),(n-1,if n=3,7,11. . .),((n+1)/2,if n=1,5,9. . .):}`
Then `f(n)` is

A

One-one and onto

B

One-one but not onto

C

One but not one-one

D

Neither one-one nor onto

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