Complexes of which of the following metal can be used in the treatment of rheumatoid arthritis?

Correct option is B

The correct answer is (b) Gold

Explanation:
• Gold compounds (chrysotherapy), such as Auranofin and Gold sodium thiomalate, are used to treat rheumatoid arthritis.
• They help reduce inflammation and slow the progression of the disease.
• Gold complexes act as Disease-Modifying Antirheumatic Drugs (DMARDs).

Information Booster:
• Cisplatin, a platinum complex, is used in cancer chemotherapy.
• Iron is used in the form of ferrous salts to treat anemia.

Additional Knowledge:
Copper (Option a)
• Essential for enzymes but its complexes aren't standard treatment for RA.
Iron (Option c)
• Overload can actually worsen joint inflammation.
Ruthenium (Option d)
• Being researched for anticancer properties, but not RA.

So the correct answer is (b)