Correct Answer: A

Rationale: The clinical manifestations of Aster suggest acromegaly, a condition characterized by the excessive growth of hands and feet due to a tumor in the pituitary gland leading to overproduction of growth hormone. Cyanosis is a bluish discoloration of the skin caused by poor oxygenation, which is not typically associated with acromegaly. The other options do not match the unique clinical manifestation described for Aster. Anemia, weight loss, moon facies, and edema are more commonly associated with other conditions like Cushing's syndrome, anemia, or heart failure.

Correct Answer: A

Rationale: The symptoms described - sudden-onset severe headache, nausea, vomiting, photophobia, neck stiffness, and positive Kernig and Brudzinski signs - are classic manifestations of meningitis. Meningitis is an inflammation of the meninges, the protective membranes covering the brain and spinal cord, often caused by infection. The sudden onset of these symptoms and signs, along with neck stiffness and positive Kernig and Brudzinski signs (indicative of meningeal irritation), strongly suggest meningitis as the most likely diagnosis in this scenario.

Correct Answer: A

Rationale: Bulimia nervosa is an eating disorder characterized by binge eating followed by compensatory behaviors such as self-induced vomiting, fasting, or excessive exercise. The repeated purging in bulimia can lead to electrolyte imbalances, such as hypokalemia (low potassium levels). Hypokalemia is a serious condition that can affect the function of the heart's electrical system, potentially leading to the development of cardiac arrhythmias (irregular heartbeats) and even cardiac arrest, which can result in death. Therefore, in a bulimic patient like Sherry, the risk of death is most likely due to the combination of hypokalemia and its complications, such as cardiac arrhythmias and arrest.

Correct Answer: A

Rationale: Albuterol (salbutamol) is a short-acting beta agonist bronchodilator commonly used for quick relief of bronchoconstriction in patients with COPD. It works by relaxing the smooth muscles in the airways, allowing for easier breathing and improved airflow. The patient's increased dyspnea, wheezing, and productive cough are indicative of bronchoconstriction, and albuterol is the most appropriate medication to provide rapid bronchodilation and symptom relief in this situation. Diphenhydramine (Benadryl) is an antihistamine and not typically used for bronchodilation in COPD. Montelukast (Singulair) is a leukotriene receptor antagonist that may be used in the maintenance treatment of COPD but is not the initial choice for acute symptom relief. Prednisone is a cortic

Correct Answer: B

Rationale: In a pregnant woman presenting with severe abdominal pain and vaginal bleeding at 8 weeks gestation with a closed cervix, the most likely cause of these symptoms is a threatened abortion. A threatened abortion is a common complication of early pregnancy characterized by vaginal bleeding and lower abdominal pain without cervical dilation. The cervix remains closed, indicating that the pregnancy is still intact but at risk of potential miscarriage. Placenta previa typically presents with painless vaginal bleeding in the second or third trimester, whereas ectopic pregnancy usually presents with abdominal pain and vaginal bleeding in the setting of a closed cervix but is less likely at 8 weeks gestation. Gestational trophoblastic disease is a rare cause of vaginal bleeding in pregnancy and typically presents in the first trimester with signs of hyperemesis gravidarum, uterine enlargement, and elevated β-hCG levels.