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B
Streptomycin
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C
Erythromycin
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D
Neomycin
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Solution
The correct option is A Penicillin Mycoplasma is the smallest microorganisms capable of reproduction. They differ from other bacteria in having no cell wall. The cellular membrane of Mycoplasma is not surrounded by the cell wall. Due to the absence of a cell wall, they are resistant to certain antibiotics like Penicillin. They are not sensitive to Penicillin as Penicillin attack the cell wall of the organism.