The correct option is B Cretinism
Of the given options, cretinism is a hormonal disorder and not a genetic disease.
Cretinism is a condition of severely stunted physical and mental growth owing to untreated congenital deficiency of thyroid hormone (congenital hypothyroidism) usually owing to maternal hypothyroidism.
Haemophilia is an inherited genetic disorder that impairs the body's ability to make blood clots, a process needed to stop bleeding.
Cystic fibrosis is a progressive, genetic disease that causes persistent lung infections and limits the ability to breathe over time.
Thalassemia is an inherited blood disorder in which the body makes an abnormal form of hemoglobin. The disorder results in excessive destruction of red blood cells, which leads to anemia.