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Assertion (A) : If alpha=cos((2pi)/(7))+...

Assertion (A) : If `alpha=cos((2pi)/(7))+isin((2pi)/(7)),p=alpha+alpha^2+alpha^4,q=alpha^3+alpha^5+alpha^6` then the equation whose roots are p and q is `x^2+x+2=0`
Reason (R) : If `alpha` is a roots of `z^7=1` then `1+alpha+alpha^2+…...+alpha^6=0`

A

Both A and R are true and R is the correct explanation of A

B

Both A and B are true but R is not correct explanation of A

C

A is true but R is false

D

A is false but R is true

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