Coordination compounds plays many important roles in animals and plants. The are essential in the storage and transport of oxygen as electrons transfer agents as catalysts and in photosynthesis Wide range of application in daily life takes place through formation of complexes Photographic fixing qualitative and quantitative analysis purification of water metallurgical extraction are some specific worth mentioning
Lead poisoning in the body can be removed by
(a) `EDTA` in the form of calcium dthydrogen salt
(b) Cis-platin
(c ) Zeisse' s salt
(d) `DMG` .

Answer

### Step-by-Step Solution:

1. **Understanding Lead Poisoning**: Lead poisoning occurs when lead builds up in the body, often due to exposure to lead-based products. It can cause serious health issues, particularly in children.

2. **Role of Chelating Agents**: Chelating agents are compounds that can bind to metal ions and help remove them from the body. They form stable complexes with metals, making them more soluble and easier to excrete.

3. **Identifying the Chelating Agent**: Among the options given, we need to identify which compound is a chelating agent specifically effective against lead.

- (a) **EDTA (Ethylene Diamine Tetraacetic Acid)**: This is a well-known chelating agent that can bind to lead ions and facilitate their excretion from the body.
- (b) **Cis-platin**: This is a chemotherapy drug and is not used for lead poisoning.
- (c) **Zeiss's salt**: This is not a recognized treatment for lead poisoning.
- (d) **DMG (Dimethylglyoxime)**: While it is a chelating agent, it is not primarily used for lead poisoning.

4. **Conclusion**: The most effective and commonly used treatment for lead poisoning is (a) EDTA in the form of calcium dihydrogen salt. It forms a soluble complex with lead, allowing it to be excreted through urine, thus reducing toxicity.

### Final Answer:
Lead poisoning in the body can be removed by (a) EDTA in the form of calcium dihydrogen salt.

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