Question

Pleuropneumonia disease is caused by

• A. Streptomyces
• B. Mycoplasma
• C. Gonyaulax
• D. Trypanosoma

Hint:

Mycoplasma are the smallest bacteria that cause respiratory diseases like pneumonia.

Answer 1

The Correct Option is B

Step 1: Reading the question.
We have to find which organism causes the disease called pleuropneumonia.

Step 2: About the disease.
Pleuropneumonia is a breathing illness seen mainly in cattle. The full name is Contagious Bovine Pleuropneumonia.

Step 3: The cause.
This disease is caused by Mycoplasma. Mycoplasma are the smallest living cells and they have no cell wall, which makes them special among microbes.

Step 4: Checking the other choices.
Streptomyces is a bacterium known for making antibiotics. Gonyaulax is a dinoflagellate found in water. Trypanosoma is a protozoan that causes sleeping sickness. None of these cause pleuropneumonia.

Step 5: Final reasoning.
Since Mycoplasma is the agent linked to bovine pleuropneumonia, it is our answer.

Step 6: Conclusion.
Therefore the correct answer is "Mycoplasma". \[ \\boxed{\\text{Mycoplasma}} \]