Step 1: Rheumatic chorea (Sydenham chorea) follows an abnormal immune response to group A streptococcal infection and produces rapid, uncoordinated jerking movements of the face, hands and feet.
Step 2: The chorea responds poorly to antirheumatic drugs, so symptomatic treatment is used. Anticonvulsants such as valproate and carbamazepine, plus neuroleptics such as haloperidol and pimozide, are the mainstays.
Step 3: Among the options, valproate is the preferred drug of choice for resistant rheumatic chorea. Probenecid is a uricosuric for gout and has no role, making valproate correct.