This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
The following statement is false regarding Grave's disease 
Select and explain. 
A. Hyperophy/hyperplasia is due to TSH-RAbs, B. Cardiac failure is common, C. Goiter is diffuse and vascular, D. Remissions and exacerbations are not infrequent
B: Cardiac failure is common
Answer: B: Cardiac failure is common 
Explanation: Grave&;s Disease (Diffuse Toxic Goiter)M/C cause of hypehyroidism, caused by stimulatory autoantibodies to TSH-RMore common in females with peak incidence between 40-60 yrsClinical FeaturesHypehyroid symptoms- heat intolerance, increased sweating and thirst, weight loss despite adequate caloric intake.Symptoms of adrenergic stimulation- palpitations, nervousness, fatigue, emotional lability, hyperkinesis and tremorOlder patients present with CVS complications (CVF and CHF)In Grave's disease- Cardiac toxicity is less and CNS toxicity is more. In secondary thyrotoxicosis cardiac toxicity is more common.(Refer: Schwaz's Principles of surgery, 9th edition, pg no: 1353-1354)