In a tropical human population in Hardy-Weinberg equilibrium for an autosomal locus determining presence/absence of pigment in the skin,the frequency of albinism (aa)is 1 in 10,000.The frequency of heterozygotes is approximately:
A)1 in 25. B)1 in 50. C)1 in 75. D)1 in 100. E)1 in 1000.