Which of the following describes hydrocephaly?

Hydrocephaly, also known as hydrocephalus, is characterized by the accumulation of cerebrospinal fluid (CSF) within the ventricles of the brain, which leads to an increase in intracranial pressure. This excessive fluid buildup results in an enlarged head size in affected individuals. The condition can occur due to a variety of reasons, such as obstruction of normal CSF flow, poor absorption, or overproduction of the fluid. In essence, the primary hallmark of hydrocephalus is the increase in head size because of this fluid accumulation, making option B the correct descriptor of the condition.