Lesch Nyhan disease is an $X-$linked recessive disorder that causes neurological damage in human beings. $A$ survey of $500$ mates from a caucasion population revealed that $20$ were effected with this disorder. What is the frequency of the normal allele in this population?

  • A

    $9.6$

  • B

    $0.8$

  • C

    $0.096$

  • D

    $96$

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