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Dysmetria ( also, dysdiadokinesia and intention tremor) is lateral cerebellum. (E).

Ataxia is a problem with the central cerebellum (D) or at least thats the best I could come up with.

ronald-dumsfeld  I actually think D is pointing at the Flocculonodular lobe. See here: https://en.wikipedia.org/wiki/Flocculus_(cerebellar)#/media/File:Human_brain_midsagittal_view_description.JPG So a lesion at D would present with Nystagmus +1  
urachus  flocculonodular is medial (central). but yes it'll have nystagmus and truncal ataxia +