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
Chances of multiple sclerosis are maximum if 
Select and explain. 
A. Mother has the disease, B. Father has the disease, C. Mother is carrier, D. Father is carrier
A: Mother has the disease
Answer: A: Mother has the disease 
Explanation: . *In multiple sclerosis genetic factors are also relevant ,the risk of familial recurrence in MS is 15%,with highest risk in first degree relatives (age adjusted risk:4-5% for siblings and 2-3 % for parents or off spring . Ref Harrison20th edition pg 2456