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Question-1 

If 1, a1 , a2 , a3 . . . an-1 are the nth roots of unity , then the value of (1 - a1) (1 - a2) (1 - a3) . . . (1 - an-1) is


(A)

0


(B)

1

(C)

n

(D)

-n





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