<prompt> About gait and balance disorders, which of the following are true or false? a The commonest cause for gait disorder is multiple infarcts b Tropical spastic paraparesis related to the retrovirus HTLV-II c Freezing of gait is common in progressive supranuclear palsy and multiple-system atrophy d Frontal gait disorder is known as the slipping clutch syndrome e Fragile X premutation has been associated with gait ataxia in older mena,c,d-True b,e-Falseb,d,e-True a,c-Falsec,d,e-True a,b-Falsea,e-True b,c,d-False  <response>: The commonest cause for gait disorder is sensory deficits. Tropical spastic paraparesis related to the retrovirus HTLV-I. Ref: Harrisons Principles of Internal Medicine, 18th Edition, Pages 193-94 Table 24-1. 