Toxins (Saxitoxins) secreted by some dinoflagellaes enter the body of human beings through food chain and result in :-

Options

A. Madness
B. Paralysis
C. Syphilis
D. Plague

Answer

### Step-by-Step Solution:

1. **Understanding the Organism**: The question refers to toxins secreted by dinoflagellates, specifically mentioning Saxitoxins. Dinoflagellates are a group of single-celled organisms that can produce harmful toxins.

2. **Identifying the Toxin**: Saxitoxins are neurotoxins produced by certain dinoflagellates, particularly those in the genus Alexandrium. These toxins can accumulate in marine organisms, especially shellfish.

3. **Food Chain Impact**: When humans consume shellfish that have ingested dinoflagellates, the Saxitoxins can enter the human body. This occurs through the food chain, where the toxin is transferred from the dinoflagellates to the shellfish and then to humans.

4. **Health Effects**: The primary health effect of Saxitoxins on humans is paralysis. This condition is known as Paralytic Shellfish Poisoning (PSP), which can lead to severe neurological symptoms and can be life-threatening.

5. **Eliminating Incorrect Options**:
- Option related to "madness" is incorrect as it pertains to rabies, which is unrelated to dinoflagellates.
- The option regarding "syphilis" is also incorrect since it is a sexually transmitted disease caused by bacteria, not related to toxins from dinoflagellates.
- The option about "plague" is incorrect as it is caused by bacteria transmitted through fleas, not related to the consumption of shellfish.

6. **Conclusion**: The correct answer to the question is that Saxitoxins secreted by dinoflagellates can cause paralysis in humans when ingested through contaminated shellfish.

### Final Answer:
**Saxitoxins secreted by some dinoflagellates can result in paralysis in humans.**

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