Q3

MCQ1 mark, −0.25

The set $\{1,2,3,5,7,8,9\}$ under multiplication modulo $10$ is not a group. Given below are four possible reasons. Which one of them is false?

(A)

It is not closed

(B)

$2$ does not have an inverse

(C)

$3$ does not have an inverse

(D)

$8$ does not have an inverse

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