Black water fever or cerebral malaria caused is by

Options

A. Plasmodium malaria
B. P. falciparum
C. Yersinia pestis
D. P. ovale

Answer

**Step-by-Step Solution:**

1. **Identify the Diseases**: The question mentions "blackwater fever" and "cerebral malaria." Both of these terms refer to severe forms of malaria.

2. **Understand the Cause**: The question asks for the causative agent of these diseases. Malaria is caused by protozoan parasites.

3. **Identify the Specific Parasite**: The specific parasite responsible for blackwater fever and cerebral malaria is *Plasmodium falciparum*. This species is known for causing the most severe forms of malaria.

4. **Recognize Symptoms**: In cases of cerebral malaria, patients may experience severe neurological symptoms, including coma. Blackwater fever is characterized by hemolysis, leading to dark-colored urine.

5. **Review the Options**: When presented with multiple-choice options, identify which one correctly states *Plasmodium falciparum* as the causative agent.

6. **Select the Correct Answer**: Based on the analysis, the correct answer to the question is *Plasmodium falciparum*.

**Final Answer**: Blackwater fever or cerebral malaria is caused by *Plasmodium falciparum*.

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