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
Which of the following act through tyrosine kinase receptor: 
Select and explain. 
A. Insulin, B. Glucagons, C. GH, D. FSH
A: Insulin
Answer: A: Insulin 
Explanation: A i.e. Insulin