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
Substernal pain is a feature of: 
Select and explain. 
A. Tachycardia, B. Emphysema, C. Angina pectoris, D. Thrombi and emboli
C: Angina pectoris
Answer: C: Angina pectoris 
Explanation: None