Both A and R are correct and R is the correct explanation of A.
Both A and R are correct but R is not the correct explanation of A.
A is correct but R is incorrect.
A is incorrect but R is correct.
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The Correct Option isA
Solution and Explanation
Mary Mallon, also known as 'Typhoid Mary', was a carrier of the typhoid fever bacteria and unknowingly spread it through the food she prepared for others.