Question: A "widow's peak" hairline in humans is coded by the dominant allele W. A straight hairline is coded by the recessive allele w. A man with a homozygous dominant WW produces a zygote with a woman with a heterozygous dominant Ww for the trait. Which allele combinations could occur in the zygote?

What is the correct answer to the question from the following choices?
OPT:
(a). WW or ww;
(b). WW or Ww;
(c). WW only;
(d). Ww only;
(b).