Cousins are

A cousin is defined, in general kinship terminology, as the child of one's aunt or uncle — that is, the child of either parent's sibling. Because either parent can have siblings, this relationship can arise from two distinct lines of descent.

Applying this to the question: a person's cousins include the children of the mother's siblings (maternal cousins) as well as the children of the father's siblings (paternal cousins). Both lines genuinely produce cousins, so no single one of maternal or paternal alone captures the whole category.

• Maternal — describes only the mother's-side cousins; it omits the equally valid paternal line.

• Paternal — describes only the father's-side cousins; it omits the equally valid maternal line.

• Siblings — describes children who share both parents, which is a closer relationship than a cousin and does not match the aunt/uncle-based definition at all.

• None of the above — would only hold if neither the maternal nor the paternal relationship were valid, but both are.

Since both the maternal and paternal relationships genuinely define cousins, and neither taken alone is exhaustive, the category that best fits is the one covering multiple valid classifications — More than one of the above.