In hyperthyroidism, auricular fibrillation is best treated with:

Correct Answer: C

Rationale: Atrial fibrillation in hyperthyroidism is best managed with digitalis to control heart rate and quinidine to restore sinus rhythm, alongside antithyroid drugs for underlying cause.

Correct Answer: C

Rationale: Hyperparathyroidism increases serum calcium, decreases phosphorus, and elevates urinary calcium due to PTH-driven bone resorption and renal effects.

Correct Answer: C

Rationale: Myxedema (severe hypothyroidism) causes cold intolerance due to low metabolic rate.

Correct Answer: D

Rationale: Candidiasis is common in diabetes (hyperglycemia), drug addiction (immunosuppression), leukemia (neutropenia), and tuberculosis (chronic illness).

Correct Answer: C

Rationale: Acute thyroiditis (suppurative) is rare; subacute thyroiditis (intended here) is treated with aspirin, rest, and steroids.