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Select and write the correct answer from the given alternatives in each of the following: If `alpha`, `beta` are non-real cube roots of unity, then `(1 + alpha) (1 + beta) (1 + alpha^4) (1 + beta^4) (1 + alpha^4) (1 + beta^4)` …. Upto 2n factors is equal to

A

a) 0

B

b) -1

C

c) 1

D

d) none of these

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