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
Cardiac pain may be transmitted to the jaw due to the overlapping of: 
Select and explain. 
A. 5th cranial nerve, third cervical nerve and first thoracic nerve, B. 7th cranial nerve, third cervical nerve and first thoracic nerve, C. 5th cranial nerve, second cervical nerve and first thoracic nerve, D. 7th cranial nerve, second cervical nerve and first thoracic nerve
A: 5th cranial nerve, third cervical nerve and first thoracic nerve
Answer: A: 5th cranial nerve, third cervical nerve and first thoracic nerve 
Explanation: Cardiac pain may be transmitted to the jaw due to the overlapping of 5th cranial nerve, third cervical nerve, and first thoracic nerve