Final answer:
Angina is chest pain or pressure that occurs when heart muscle cells do not receive adequate blood flow and become starved of oxygen. The main symptom of angina is chest pain, along with possible shortness of breath, sweating, or nausea.
Step-by-step explanation:
Angina is chest pain or pressure that occurs when heart muscle cells do not receive adequate blood flow and become starved of oxygen. It may also be accompanied by shortness of breath, sweating, or nausea. Angina is a symptom of low oxygen to heart tissues, and thus, the correct answer is a) Chest pain.