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: Anatomy
In a case of chest pain with pericarditis and pericardial effusion, pain is referred by - 
Select and explain. 
A. Phrenic nerve, B. Superficial cardiac plexus, C. Deep cardiac plexus, D. Vagus nerve
A: Phrenic nerve
Answer: A: Phrenic nerve 
Explanation: Parietal pericardium is supplied by Phrenic nerve.