Which one of the following is the strongest risk factor for stroke?

A 75-year-old female presented to the Emergency department with a transient ischaemic attack.
Her only past medical history is type II diabetes of 20 year duration.
Her blood pressure was 140/90 mmHg and ECG showed atrial fibrillation.
Which one of the following is the strongest risk factor for stroke?

A. Age ≥ 75
B. Atrial fibrillation (AF) (Correct)
C. Diabetes mellitus
D. Female sex
E. Hypercholesterolaemia

The following are risk factors for stroke:
Age (above 65)
Diabetes mellitus and
Hypercholesterolaemia.
Stroke is more common in males than in females. Hence option D is incorrect