If a, b are positive integers, define a * b = α where ab = α (modulo 7), with this * operation, then inverse of 3 in group G (1, 2, 3, 4, 5, 6) is

If a, b are positive integers, define a * b = α where

1.	If a, b are positive integers, define a * b = α  where ab = α (modulo 7), with this * operation, then inverse of 3 in group G (1, 2, 3, 4, 5, 6) is
A.	3
B.	1
C.	5
D.	4
Answer» D. 4

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If a, b are positive integers, define a  b = α  where ab = α (modulo 7), with this  operation, then inverse of 3 in group G (1, 2, 3, 4, 5, 6) is

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