Correct Answer: B

Rationale: In Addison's disease, adrenal insufficiency leads to decreased aldosterone production. The decreased aldosterone results in impaired sodium reabsorption and potassium excretion, leading to hyperkalemia. Hypernatremia (Choice A) is unlikely because sodium reabsorption is impaired. Hyperglycemia (Choice C) is not a typical lab finding in Addison's disease. Hypercalcemia (Choice D) is not associated with Addison's disease; rather, it can be seen in conditions like hyperparathyroidism.

Correct Answer: D

Rationale: Recognizing signs of hypoglycemia is essential for managing type 1 diabetes mellitus. Hypoglycemia, which occurs when blood glucose levels drop too low, can be dangerous and requires immediate intervention to prevent severe complications. Monitoring blood glucose levels more frequently than once a day, following a strict meal plan, and administering insulin only when blood glucose is high are important aspects of diabetes management but recognizing signs of hypoglycemia is crucial as it enables prompt action to prevent adverse outcomes.

Correct Answer: D

Rationale: The correct answer is D: Severe coughing spells. Pertussis, also known as whooping cough, typically presents with severe coughing spells that can be followed by a characteristic 'whoop' sound. These coughing fits can be intense and prolonged, often causing the child to gasp for air between coughs. Option A, dry hacking cough, is a common symptom of other respiratory conditions like bronchitis. Option B, inspiratory stridor, is more commonly associated with conditions like croup. Option C, nasal congestion, is not a typical symptom of pertussis.

Correct Answer: B

Rationale: Edema is a hallmark clinical manifestation of nephrotic syndrome. In nephrotic syndrome, there is increased permeability of the glomerular filtration barrier, leading to protein loss in the urine (proteinuria). The decrease in serum protein levels results in a reduced oncotic pressure, leading to fluid shifting from the intravascular space into the interstitial spaces, causing edema. Jaundice (choice A) is not typically associated with nephrotic syndrome. Hypertension (choice C) is more commonly seen in conditions like nephritic syndrome. Polyuria (choice D) is excessive urination and is not a prominent feature of nephrotic syndrome.

Correct Answer: B

Rationale: In Addison's disease, adrenal insufficiency leads to decreased aldosterone production. The decreased aldosterone results in impaired sodium reabsorption and potassium excretion, leading to hyperkalemia. Hypernatremia (Choice A) is unlikely because sodium reabsorption is impaired. Hyperglycemia (Choice C) is not a typical lab finding in Addison's disease. Hypercalcemia (Choice D) is not associated with Addison's disease; rather, it can be seen in conditions like hyperparathyroidism.