This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S., Subject name: Medicine
All of the following are true about multiple sclerosis EXCEPT - 
Select and explain. 
A. Ataxia, B. Spasticity, C. Rigidity, D. Vertigo
C: Rigidity
Answer: C: Rigidity 
Explanation: (C) (Rigidity) (3395-402-H 18th) (1193 Davidson 21st)MULTIPLE SCLEROSIS* Characterized inflammation, demyelination, gliosis (scarring) and neuronal loss.* Weakness of the limbs, exercise induced weakness is characteristic symptoms of MS. Weakness is of the UMN type and is usually accampained by other pyramidal signs such as spasticity, hyperreflexia and Bab inskis sign.* Initial symptoms, sensory loss (37%), optic neuritis (36%) weakness (35%), paresthesia, diplopia, ataxia, vertigo, paroxysmal attacks, bladder, Lthermitte's, pain, dementia, visual loss, facial palsy, impotence, Myokymia, Epilepsy, Falling.* The expanded disability status score (EDSS) is a useful measure neurologic impairment in MS.* Tuberous sclerosis - TRIADi) Adenoma sebaceumii) Seizureiii) Mental retardation