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: Biochemistry
Tyrosine kinase receptor is activated by ? 
Select and explain. 
A. Growth hormone, B. Insulin, C. TSH, D. Glucagon
B: Insulin
Answer: B: Insulin 
Explanation: Ans. is 'b' i.e., Insulin