Question

Choose the most appropriate option:

• A. All bacteria are pathogenic
• B. All viruses are pathogenic
• C. Some bacteria and all viruses are pathogenic
• D. Both bacteria and viruses are non-pathogenic

Answer 1

The correct option is C Some bacteria and all viruses are pathogenic

Only $1\%$ bacteria cause infections but all viruses are pathogenic. There are some friendly non-pathogenic bacteria too that reside within the human body.