If prod(p=1)^(r) e^(iptheta)=1, where pr...

If `prod_(p=1)^(r) e^(iptheta)=1`, where `prod` denotes the continued product and `i=sqrt(-1)`, the most general value of `theta` is (where, n is an integer)

A

(a)`(2npi)/(r(r-1)),n in I`

B

(b)`(2npi)/(r(r+1)),n in I`

C

(c)`(4npi)/(r(r-1)),n in I`

D

(d)`(4npi)/(r(r+1)),n in I`

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The correct Answer is:

D

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