Which of the following microorganisms causes common cold?
A
Bacteria
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B
Virus
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C
Protozoa
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D
Algae
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Solution
The correct option is B Virus Common cold is caused by the viruses of the group rhinovirus. These are the viruses which infect the upper respiratory tract and cause infection. The common symptoms are running nose, sneezing, throat pain, cough, sore throat, etc. The virus can spread through air droplets and cause infection in the other persons.