1. A 6-year-old patient presents with fatigue, hyperpigmentation, and hypotension. Laboratory tests reveal hyponatremia and hyperkalemia. Which of the following is the most likely diagnosis? A. Primary Adrenal Insufficiency B. Secondary Adrenal Insufficiency C. Diabetic Ketoacidosis (DKA) D. Syndrome of Inappropriate Secretion of Antidiuretic Hormone (SIADH) Correct Answer: A. Primary Adrenal Insufficiency Rationale: The patient's symptoms and lab findings are indicative of primary adrenal insufficiency, also known as Addison's disease. This condition is characterized by inadequate production of cortisol and often aldosterone, which leads to the clinical presentation described. A 7-year-old patient presents with fatigue, hyperpigmentation, and low blood pressure. Which of the following is the most likely diagnosis? A. Diabetic ketoacidosis (DKA)