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
Death due to smoke inhalation is due to: 
Select and explain. 
A. Hypoxemia, B. Anemic hypoxia, C. Ischemic hypoxia, D. All of the above
B: Anemic hypoxia
Answer: B: Anemic hypoxia 
Explanation: Ans. b. Anemic hypoxiaIn smoke/fire patient generally dies of excess CO poisoning (most frequent cause of death).If there is low PaO, - it is called as hypoxic hypoxia.In smoke (CO poisoning) PaO, will be normal and the problem is COHb.An abnormal Hb or Reduced Hb concentration comes under anemic hypoxia.