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1. AMarked tremor with hyperactive bowel sounds and dilated pupils
2. BDiffuse rigidity with no clonus, myoclonus or hyperreflexia on examination
3. CBilateral ankle clonus with brisk, sustained hyperreflexia throughout both lower limbs
4. DSpontaneous ocular clonus with inducible myoclonus on limb movement
5. ESymptom onset within hours of a single serotonergic medication dose