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
Platypnea may be seen in all of the following conditions, except 
Select and explain. 
A. Bilateral Diaphragmatic palsy, B. Pleural effusion, C. Pulmonary embolism, D. Cirrhosis
A: Bilateral Diaphragmatic palsy
Answer: A: Bilateral Diaphragmatic palsy 
Explanation: Answer is A (Bilateral Diaphragmatic palsy): Bilateral diaphragmatic palsy is associated with ohopnea and not platypnea. It has not been mentioned as a cause for platypnea. Severe COPD, pleural effusion and pulmonary embolism may present with either ohopnea or platypnea depending on the pathophysilogy.