<prompt> A 48 year-old woman underwent subtotal thyroidectomy. She has a vague family history of malignant hypehermia. She develops agitation, restlessness, fever, tremor, shivering, and tachypnea. Thyrotoxic crises can be best distinguished from malignant hypehermia by estimating -Temperature variationIncreased CPK levelsLDHMuscular rigidity  <response>: Ans. is b i.e., Increased CPK levels 