Which gland is responsible for maintaining the basal metabolic rate $(BMR)$?

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?

Which of the following radioactive isotopes is used to detect thyroid cancer?

What are the effects of hypothyroidism (observed during pregnancy) on the development and maturation of a growing baby?

Which of the following hormones contains iodine?

Hyperthyroidism causes which of the following diseases?