'Exophthalmic goitre' $(Grave's\,disease)$ is caused due to

Select the incorrect option.

The $BMR$ increases due to which of the following?

Which of the following is $NOT$ a symptom of hypothyroidism in a growing child?

Which of the following glands is associated with the consumption of iodized salt?

Read the given statements $:$
$(A)$ Hypothyroidism during pregnancy causes defective development and maturation of the growing baby.
$(B)$ Thyroxine does not require a secondary messenger.
$(C)$ Thyroxine plays a major role in the regulation of Basal Metabolic Rate $(BMR)$.
$(D)$ Hypersecretion of thyroxine could cause immunodeficiency.
How many of the above statements are correct?