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
True about Rheumatic fever - 
Select and explain. 
A. Chorea is aggravated during pregnancy, B. Chorea & arthritis co-existing, C. Subcutaneous nodules are tender, D. Erythema multiforme seen
A: Chorea is aggravated during pregnancy
Answer: A: Chorea is aggravated during pregnancy 
Explanation: None