This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
Pulmonary Chemo-reflex is characterized by? 
Select and explain. 
A. Reflex bradycardia, B. Rise in blood pressure, C. Reflex tachycardia, D. Pulmonary oligaemia
A: Reflex bradycardia
Answer: A: Reflex bradycardia 
Explanation: Ans. A Reflex bradycardiaRef: Ganong, 25th ed. pg. 662Pulmonary Chemo-Reflex Consists of:Q1.Apnea followed by Rapid breathing2.Bradycardia3.HypotensionIt is caused by Stimulation of J receptors by intravenous or intra-cardiac administration of chemicals like capsaicin.