<prompt> A 65-year-old man presents to your clinic after falling several times in the past few months. On examination, his most notable findings are an unstable, wide-based gait and marked retropulsion. He does have bradykinesia with masked facies and dysahria. You find no evidence of cogwheeling or resting tremor. His symptoms do not respond to levodopacarbidopa. During the next few months, his eye movements are notable for the slowing of veical saccades and fast phases. What is the most likely diagnosis?L-DOPA resistant PDProgressive supranuclear gaze palsyMultiple system atrophyFoville syndrome  <response>: Option A - Ruled out as resting tremors are absent disease is ruled out as it is a ATYPICAL PARKINSONISM disease. Option B- since in the question its mentioned regarding the veical gaze of the patient, its the most appropriate option. Option C- Ruled out as autonomic insufficiency isnt mentioned in the question. Option D- Manifestation of STROKE related to Pons with VIth nerve palsy. 