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B
Schaudinn and Hoffmann
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C
Lederberg and Tatum
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D
Leeuwenhoek
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Solution
The correct option is B Lederberg and Tatum Lederberg and Tatum showed that the bacterium Escheria coli entered a sexual phase during which it could share genetic information. Conjugation is the process by which one bacterium transfers genetic material to another through direct contact. During conjugation, one bacterium serves as the donor of the genetic material, and the other serves as the recipient. The donor bacterium carries a DNA sequence called the fertility factor, or F-factor.
So, the correct answer is option 'Lederberg and Tatum'.