SARS is a respiratory infection which is caused by ‘X’ whereas bird flu is caused by ‘Y’. Here ‘X’ and ‘Y’ are, respectively
A
H5N1 virus and retro virus
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B
H5N1 virus and RNA virus
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C
Retro virus and H5N1 virus
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D
DNA virus and retro virus
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Solution
The correct option is C
Retro virus and H5N1 virus SARS is a respiratory infection with pneumonia-like symptoms and is caused by retrovirus whereas bird flu is caused by H5N1 virus. A H5N1 virus attacks birds and mammals and can cause a serious flu epidemic in humans.