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
All are TRUE about hyperparathyroidism, except - 
Select and explain. 
A. Commonly occurs after thyroidectomy, B. May cause hypercalcemia, C. Solitary adenoma is the most common cause, D. None of the above
A: Commonly occurs after thyroidectomy
Answer: A: Commonly occurs after thyroidectomy 
Explanation: Thyroid crisis or storm -
 It is a rare disorder nowadays 
It is an extreme form of thyrotoxicosis which is precipitated by stressful illness, thyroid surgery or Radioiodine administration.
 It presents with symptoms of thyrotoxicosis which are -
 Severe tachycardia, Arrhythmias
 Marked delirium
 Vomiting
 Diarrhoea
Dehydration
 High fever
 The mortality rate is very high.