A Patient Has Been Diagnosed with Primary Hypothyroidism

Multiple Choice

A patient has been diagnosed with primary hypothyroidism.
Which statement accurately describes this condition?

A) The hypothalamus is not secreting thyrotropin-releasing hormone; therefore, thyroid-stimulating hormone (TSH) is not released from the pituitary gland.
B) The pituitary gland is dysfunctional and is not secreting TSH.
C) The abnormality is in the thyroid gland itself.
D) The abnormality is caused by an excess intake of iodine.