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Let X = { 1,2,3,4}, Y = {a,b,c,d} and f=...

Let X = { 1,2,3,4}, Y = {a,b,c,d} and f={(1,a), (4,b), (2,c),(3,d),(2,d)}. Then f is

A

an one-to-one function

B

an onto function

C

a function which is not one-to-one

D

not a function

Text Solution

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The correct Answer is:
D
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