Task: Question Answering
Input (English): Question: 50-year-old man, mechanic, consulted for a two-year evolution of difficulty in handling the right hand and a feeling of stiffness in the arm. His wife notices his expressionless face and reports that he has very vivid nightmares that wake him up agitated. During the examination, rigidity was observed in the right limbs and slow walking without right arm. What is the most likely diagnosis? 
 Options:  <1> Left thalamic lacunar infarct. <2> Amyotrophic Lateral Sclerosis. <3> Parkinson's disease <4> Cervical plexopathy <5> Corticobasal degeneration.
Output (English): 3