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: Physiology
[{'content': 'Which of the following act through tyrosine kinase receptor: \nSelect and explain. \nA. Insulin, B. Glucagons, C. GH, D. FSH', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Insulin', 'role': 'assistant'}]