A girl child came with complaints of involuntary movements was diagnosed as a case of Syndenham's chorea, suggestive of a diagnosis of acute rheumatic fever. There is no complaint of carditis or ahritis. Throat culture is negative. Which of the following will most likely suggest recent streptococcal infection?
ASLO
Antistreptolysin S
PCR for M protein
Anti-hyaluronidase
Ans. a. ASLO