Which of the following diseases refers to a congenital condition in which the head is small with small cerebral hemispheres and with moderate to severe motor and mental retardation?

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Microcephaly is a condition where the head circumference is smaller than normal, along with underdeveloped cerebral hemispheres and moderate to severe retardation. Hydrocephalus is an abnormal accumulation of cerebrospinal fluid in the brain, leading to an enlarged head size. Anencephaly is a lethal condition where the brain and skull don't develop properly. Spina bifida is a neural tube defect that can cause paralysis and other physical disabilities. Meningomyelocele is a severe form of spina bifida where the spinal cord and its protective covering (meninges) protrude out of the spinal column.

Which of the Following Diseases Refers to a Congenital Condition