This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute Kidney Injury, Subject name: Medicine
Platypnea is seen with? 
Select and explain. 
A. Hepato-pulmonary syndrome, B. Hepato-renal syndrome, C. Renal aery stenosis, D. Kyphoscoliosis
A: Hepato-pulmonary syndrome
Answer: A: Hepato-pulmonary syndrome 
Explanation: Platypnea: Increase dyspnea on sitting position Seen in 1. Atrial myxoma 2. Hepatopulmonary syndrome