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B
dsRNA
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C
ssDNA
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D
dsDNA
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Solution
The correct option is B ssDNA M13 is a bacteriophage which means it infects bacterium. The genome is ssDNA. The ssDNA is stabilized by nucleocapsid (outer covering of virus). It widely used in recombinant DNA technology due to its small size (7000bp) approx and high cloning capacity which means it can hold large DNA fragment. The cloned DNA obtained is ssDNA.