In humans,brown eyes are dominant over blue eyes. Assume thateye colour in this case is the result of alleles of a single gene.A person with brown eyes and a person with blue eyes have children.Which of the following possible sets of children (or child in thecase of option b) would allow the brown-eyed person to determinetheir genotype with certainty?

a.All brown-eyed children

b.Having 1 brown-eyed child

c.Having four blue-eyed childrend.

d.Having 2 brown-eyed and 2 blue-eyed children

and explanation please.