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: Pediatrics
[{'content': 'Which among the following drug is not used in the\ntreatment of Tetralogy of Fallot? \nSelect and explain. \nA. β blocker, B. α agonists, C. Calcium channel blockers, D. Morphine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Calcium channel blockers reduce systemic Vascular resistance which incsceases blood flow into Aorta and decreases blood to pulmonary vasculature. This adds to the pathology and worsens the condition.', 'role': 'assistant'}]