Clostridium botulinum is an obligate anaerobic bacterium, meaning it can only grow and survive in the absence of oxygen. It produces a potent neurotoxin that can lead to the symptoms of botulism when ingested in contaminated food.
So, the correct option is (B): an obligate anaerobe

Study the chemical structure of an addictive drug shown below and answer the questions that follow.
Given below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below:
Health is described as a state of complete physical, mental and social well-being.
The disease is a circumstance where malfunctioning of the body organs occurs leading to uneasiness and discomfort.


Read More: Human Health and Disease