Q: 217 (SSC/NA)
question_subject:
Science
question_exam:
SSC
stats:
0,20,2,2,20,0,0
keywords:
{'polio': [3, 0, 0, 0], 'bacteria': [4, 1, 2, 3], 'fungus': [1, 0, 1, 1], 'virus': [4, 0, 0, 1], 'protozoa': [1, 0, 0, 0]}
Polio, also known as poliomyelitis, is caused by a virus. A virus is a microscopic infectious agent that replicates inside the cells of a living host. Poliovirus is the specific virus responsible for causing polio. It primarily affects the nervous system, specifically the spinal cord, and can result in paralysis or muscle weakness.
Bacteria, on the other hand, are single-celled microorganisms that can cause various diseases, but they are not the cause of polio. Fungus and protozoa are also not responsible for causing polio.
Therefore, the correct answer is option 2 - virus. It`s important to note that vaccines are available to prevent polio and have significantly reduced its incidence worldwide.