Polio is caused by

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Q: 217 (SSC/NA)
Polio is caused by

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]}