Multiple sclerosis is most commonly seen in which age group?

• A. 50 to 70 years
• B. Under 10 years
• C. 10 to 20 years
• D. 20 to 40 years

Answer: (D)

Multiple sclerosis typically begins in young adults. The most common onset is between 20 and 40 years old, with the peak in the 30s. While it can occur outside this range, those occurrences are much less common. So, the age group 20–40 years best describes where MS most often presents. This pattern helps clinicians suspect MS when a young adult experiences intermittent neurological symptoms (like optic neuritis or new sensory or motor deficits) that evolve over time and in different parts of the nervous system.