<prompt> Earliest feature of parkinsonism?AnosmiaRigidityPostural instabilityFreezing  <response>: Ans. a AnosmiaRef: Harrison 19th ed. 2609Non-motor symptoms may precede motor symptoms of Parkinsons diagnosis by years. The most recognizable early symptoms include: Loss of sense of smell, constipation REM behavior disorder mood disorders Orthostatic hypotensionSubsequently Motor Features Appear1. Tremors resting 4-6 Hz2. Rigidity3. Bradykinesia4. Good Response to levodopa 