World TB Day is observed on
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March 24
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March 7
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April 21
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April 18
A
Correct answer
Explanation
World TB Day is observed on March 24 to commemorate the date in 1882 when Dr. Robert Koch announced his discovery of Mycobacterium tuberculosis. This day is used to educate the public about the impact of tuberculosis around the world. Other dates like April 7 are associated with different health observances like World Health Day.