Which ailment below is a type of mental retardation caused by insufficient iodine during fetal development?

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Cretinism is a type of mental retardation caused by insufficient iodine during fetal development. Goiter is an enlargement of the thyroid gland due to lack of iodine or other reasons, pellagra is a nutritional deficiency disease caused by inadequate intake of niacin (vitamin B3), and Graves' disease is an autoimmune disorder that causes hyperthyroidism.

Which Ailment Below Is a Type of Mental Retardation Caused