The complex used as an anticancer agent is
or
Which one of the following coordination compounds is used to inhibit the growth of tumours

Options

A. `[Ag(S_(2)O_(3))_(2)]^(3-)`
B. Cis platina
C. `[Ag(CN)_(2)]^(-)`
D. `[Cu(NH_(3))_(4)]^(2+)`

Answer

To determine which coordination compound is used as an anticancer agent, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Coordination Compounds**: The question provides two coordination compounds, but only one is known for its use as an anticancer agent.

2. **Recall Known Anticancer Agents**: The most well-known coordination compound used in cancer treatment is **cisplatin**. It is important to remember its structure and composition.

3. **Understand the Structure of Cisplatin**: Cisplatin has the formula:
\[ \text{Pt(NH}_3\text{)}_2\text{Cl}_2 \]
In this compound, platinum (Pt) is the central metal atom, surrounded by two ammonia (NH₃) ligands and two chloride (Cl) ligands.

4. **Determine the Coordination Number**: The coordination number of cisplatin is 4, as it has four ligands attached to the platinum atom.

5. **Calculate the Oxidation State**: To find the oxidation state of platinum in cisplatin, we can set up the equation:
\[ x + 2(0) + 2(-1) = 0 \]
where \(x\) is the oxidation state of platinum. Solving this gives:
\[ x - 2 = 0 \implies x = +2 \]
Thus, the oxidation state of platinum in cisplatin is +2.

6. **Confirm the Use of Cisplatin**: Cisplatin is widely recognized for its effectiveness in inhibiting the growth of tumors and is used in chemotherapy.

7. **Select the Correct Answer**: Based on the information gathered, the correct coordination compound used as an anticancer agent is **cisplatin**.

### Final Answer:
The coordination compound used to inhibit the growth of tumors is **cisplatin**.

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