Can you provide a comprehensive set of viva (oral exam) questions covering hypothyroidism, including its definition and differentiation (primary, secondary, tertiary), clinical features of overt disease, pathophysiology of Hashimoto thyroiditis, laboratory profile (TSH, free T4, antibodies), most sensitive screening test, indications for treating subclinical hypothyroidism, initial levothyroxine dosing for a 30‑year‑old woman without cardiac disease, dose adjustments in elderly patients with coronary artery disease, common drug interactions that increase levothyroxine requirements, role of T3 versus T4 therapy and when combination therapy is considered, follow‑up schedule and target TSH range after treatment initiation, potential complications of untreated hypothyroidism during pregnancy, management in malabsorption syndromes, effect of pregnancy on levothyroxine dosing, signs of overtreatment and their correction, use of liothyronine in myxedema coma with dosing considerations, differences between congenital and adult screening, long‑term cardiovascular risks of chronic hypothyroidism, and steps to evaluate refractory hypothyroidism despite adequate levothyroxine adherence?