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If x + 1/x=1 and p=x^100+1/x^1000 and q...

If `x + 1/x=1 and p=x^100+1/x^1000 and q` be the digit at unit place in the number `2^(2^n)+1,n in N and n>1`, then p+q is equal to .........

A

8

B

6

C

7

D

0

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