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
25 yr old female develops masseter muscle spasm after IV succinyl choline. ETCO2 progressively increases, hea rate increases, temperature raises; management includes all except :- 
Select and explain. 
A. Sta halothane to decrease the hea rate, B. Hyperventilate with 100 % oxygen, C. Active cooling measures, D. Treat acidosis
A: Sta halothane to decrease the hea rate
Answer: A: Sta halothane to decrease the hea rate 
Explanation: It is most probably malignant hypehermia. Halothane is contraindicated in malignant hypehermia.