In which disease do the lips and fingernails of the patient turn from gray to bluish in color?

  • A
    Common cold
  • B
    Pneumonia
  • C
    Cancer
  • D
    $AIDS$

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Identify the symptoms of pneumonia.

Match the following bacteria with the diseases and choose the correct option.
Column-$I$ Column-$II$
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$(B)$ Yersinia pestis $(2)$ Anthrax
$(C)$ Bacillus anthracis $(3)$ Syphilis
$(D)$ Vibrio cholerae $(4)$ Cholera

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Which of the following pairs are not viral diseases?

Identify the pathogen responsible for causing the disease known as $Black\, Death$.

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