Ans.
Alleles are defined as alternative forms of a particular gene, responsible for different phenotypic expression of that gene trait. Multiallelic condition represents three or more alternative forms or alleles for a specific gene.
Eye color shows a polygenic trait, which is influence by multiple alleles of different genes. For eye color, there are two genes, one gene with two different alleles (one for blue eye color and brown eye color); and another gene with two different alleles (one for lighter eye color and one for green eye color).
Thus, the correct answer is option A). 'can interact to influence a trait, such as eye color.'