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Question

The germ theory of diseases was established by

A
Louis Pasteur
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B
Robert Koch
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C
Lister
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D
Alexander Fleming
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Solution

The correct option is A Louis Pasteur
Louis Pasteur proposed the germ theory of disease. This theory explains that the disease is caused by the microorganisms which cannot be seen by naked eyes. These are small and microscopic organisms. These organisms are dependent on the host for activities like growth. He demonstrated that fermentation is the result of the action of microorganism on sugar.
Thus, the correct answer is 'Louis Pasteur'.

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