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: Physiology
Nerve ending sensitive to noxious stimuli are present in all excepta) Stomachb) Intestinec) Mesentryd) Livere)  Brain 
Select and explain. 
A. ab, B. de, C. cd, D. bd
B: de
Answer: B: de 
Explanation: Brain does not have any pain receptors, while lung and liver parenchyma are insensitive to pain.