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
Which of the following cardiovascular conditions can result in a medical emergency in the dental office causing
substernal pain, facial pallor, and cold perspiration: 
Select and explain. 
A. Angina pectoris, B. Congestive heart failure, C. Hypertension, D. Patent ductus arteriosus
A: Angina pectoris
Answer: A: Angina pectoris 
Explanation: None