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Question : 80 of 86

Marks: +1, -0

If

x y^{p-1}=a, x y^{q-1}=b,

and

x y^{r-1}=c

the

a^{q-r} b^{r-p} c^{p-q}

is equal to

1
0
$p+q+r-1$
None of these

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