This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
Chemoreceptors are located in which area- 
Select and explain. 
A. Medulla, B. Arch of aorta, C. Bifurcation of carotid artery, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is 'd' i.e., All of the aboveo Central chemoreceptors - On ventral surface of medulla.o Peripheral chemoreceptors - At bifurcation of common carotid artery (carotid body) and arch of aorta (aortic bodies)