Question

Which are correct examples of physical (P), chemical (C), and biological (B) barriers?

P: complement system; C: saliva; B: coughing
P: coughing; C: saliva; B: complement system
P: coughing; C: sneezing; B: complement system
P: complement system; C: saliva; B: sneezing

Answer 1

[AI-generated answer — Bot GPT 3.5]

The correct examples are:

P: complement system; C: saliva; B: coughing