Iodine deficiency disorder form a spectrum of abnormalities, EXCEPT–

Correct option is D

Sol. Iodine Deficiency Disorders (IDDs) include a range of conditions like goitre, cretinism, mental retardation, deaf-mutism, and poor brain development. Iodine is essential for thyroid hormone production, which regulates brain and body development. Neck rigidity is not related to iodine deficiency but is commonly associated with meningitis or neurological disorders.
Explanation of each option:
· (a) Goitre – A classic symptom of IDD due to thyroid enlargement in response to low iodine.
· (b) Mental retardation – A key feature of severe iodine deficiency in pregnant women affecting fetal brain development.
· (c) Deaf mutism – Seen in endemic cretinism due to maternal iodine deficiency during pregnancy.
· (d) Neck rigidity – Correct answer. This is a sign of meningitis, not a manifestation of iodine deficiency.