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
Pulmonary hypertension may occur in all of the following conditions except - 
Select and explain. 
A. Toxic oil syndrome, B. Progressive systemic sclerosis, C. Sickle cell anemia, D. Argemone mexicana poisoning
D: Argemone mexicana poisoning
Answer: D: Argemone mexicana poisoning 
Explanation: None