This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Ohodeoxia is a feature of 
Select and explain. 
A. Hepatorenal syndrome, B. Hepatopulmonary syndrome, C. Hepatic encephalopathy, D. Hepatic failure
B: Hepatopulmonary syndrome
Answer: B: Hepatopulmonary syndrome 
Explanation: Answer- B. Hepatopulmonary syndromeOhodeoxia refeis to aerial desaturation noted when sitting uP as opposed to lying down.Conditions associated:A) Cardiac (intracardiac shunt)Atrial septal defect (ASD)Patent foramen ovale (PFO)PneumonectomyUsually associated with pulmonary hypeension or raised right atrial (RA) pressure (e.g. constrictive pericarditis, cardiac tamponade).B) Pulmonary (intrapulmonary right-to-left shunts)HepatopulmonarysyndromePulmonary diseaseCOPDPulmonary embolismC) Upper airway tumourAcute respiratory distress syndromeD) MiscellaneouscausesAutonomic neuropathyAcute respiratory distress syndrome (ARDS)