Question

Which of the following do not transmit diseases?

A. The use of contaminated needles
B. Acids in the stomach
C. Drinking water containing pathogens
D. Insects

Answer 1

acids in the stomach

Answer 2

The answer is B. Acids in the stomach, because insects, the use of contaminated needles, and drinking water containing pathogens, can all transmit diseases.
Hope this helps