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
Highest rate of impulse generation is given in: 
Select and explain. 
A. SA node, B. AV node, C. Bundle of HIS, D. Purkinje system
A: SA node
Answer: A: SA node 
Explanation: Answer is A (SA Node) The rate of impulse generation/rate of discharge is highest in the SA node. Note: Highest Rate of impulse generation in seen in : SA NodeQ Highest Rate of conduction is seen in : Purkinje SystemQ