This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inhalational Anesthetic Agents, Subject name: Anaesthesia
All signs malignant hypehermia except 
Select and explain. 
A. Reduced mixed venous oxygen tension, B. Hyperkalemia, C. Hypotension, D. Metabolic acidosis
C: Hypotension
Answer: C: Hypotension 
Explanation: Malignant hypehermia is hypermetabolic state with following clinical features 1. Marked increased metabolism Increased co2 production Increased oxygen consumption Reduced mixed venous oxygen tension Metabolic acidosis Cyanosis Hypehermia 2. Increased sympathetic activity Tachycardia Hypeension Arrhythmias 3. Muscle damage Generalized rigidity Hyperkalemia Hypernatremia Hyperphosphatemia Myoglobinuria Note : Capnograph with a sudden and progressive increase in ETCO2 is typical of malignant hypehermia. One of the earliestandmost sensitive indicatorsof malignant hypehermia.