Identify the incorrectly matched pair:
1. Conn’s disease: Hyperaldosteronism
2. Addison’s disease: Hypoadrenalism
3. Osteitis, fibrosa, cystica: Hypoprathyroidism
4. Hashimoto’s disease: Hypothyroidism

A patient suspected of having hypothyroidism is investigated and has low blood levels of thyroxine and triiodothyronine. He is given thyrotropin that causes the hormone levels to return to normal. What would such a condition be called?

1. Primary hyposecretion
2. Secondary hyposecretion
3. Primary hypersecretion
4. Secondary hypersecretion

Assertion: Thyroxine [${\mathrm{T}}_4$] is responsible for most of the actions of thyroid hormones at the cellular level.
Reason: It is the major hormone released by thyroid gland and is also formed in the periphery by conversion from ${\mathrm{T}}_3$.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: Without the thyroid hormone, epinephrine would have only a weak effect.
Reason: Thyroid hormone increases the number of receptors available for epinephrine at the latter's target cell.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.