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: Anaesthesia
Capnography is used for? 
Select and explain. 
A. Oxygen saturation of blood, B. Amount of CO2 transpoed in blood, C. Diagnosing malignant hypehermia, D. Myocardial perfusion
C: Diagnosing malignant hypehermia
Answer: C: Diagnosing malignant hypehermia 
Explanation: Ans. is 'c' i.e., Diagnosing malignant hypehermiaUses of CapnoGRaphyIt is the surest confirmatory sigr of correct intubation in trachea.Incorrect position of tube in the esophagus instead of trachea (esophageal intubation) will yield ETCO2 = 0.Diagnosing malignant hypehermia - ETCO2 increases significantly (more than 100 mg Hg).