If A = {a, b, c, d} and B = {1, 2, 3}, t...

If A = {a, b, c, d} and B = {1, 2, 3}, then which of the following is a relation from A to B?

A

1) `R_(1) ={(a,1), (2,b) , (c,3)}`

B

2) ` R_(2) = {(a,1) , (d,3),(b,2), (b,3)}`

C

3) `R_(3) = {(1,a) ,(2,b) ,(3,c)}`

D

4) `R_(4)= {(a,1) ,(b,2),(c,3), (3,d)}`

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The correct Answer is:

B

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