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Which of the following complexes is used as an anti-cancer agent:

1. mer-[Co(NH3)3Cl3]
2. cis-[PtCl2(NH3)2]
3. cis-K2[PtCl2Br2]
4. Na2CoCl4

Correct answer: cis-[PtCl2(NH3)2]

Solution

Cisplatin, represented as cis-[PtCl2(NH3)2], is a well-known anti-cancer agent used in chemotherapy due to its ability to bind to DNA and inhibit cell division.

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