You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Massive myoclonus is a hallmark of which stage of SSPE? and explain in detail?
Ans. B. Stage 2Clinical stages of subacute sclerosis panencephalitis:StageClinical manifestationsStage IPersonality changes, failure in school, strange behaviorStage IIMassive, repetitive, and frequent myoclonic jerks, seizures and dementiaStage IIIRigidity, extrapyramidal symptoms, and progressive unresponsivenessStage IVComa, vegetative state, autonomic failure, and akinetic mutism