Tetanus is a serious bacterial infection caused by the bacterium Clostridium tetani. The bacteria are commonly found in a variety of environments and substances that can lead to human infection if entered into open wounds or cuts.
Given the above explanations, the correct answer to the question "Tetanus bacteria are found in–" is All of these, because Clostridium tetani can be found in soil, cowdung, and on objects like rusty iron.
