Standard 18-carat gold sold in the market contains:
- A82 parts gold and 18 parts other metals
- B18 parts gold and 82 parts other metals
- C18 parts gold and 6 parts other metalsCorrect
- D9 parts gold and 15 parts other metals
Explanation
The purity of gold is measured in carats where 24 carat represents 100 percent pure gold. Therefore 1 carat equals 1 part out of 24. Standard 18 carat gold means that out of a total of 24 parts, 18 parts are pure gold and the remaining 6 parts are other metals like copper or silver. This ratio ensures the gold is durable enough for jewelry. Option C correctly reflects this 18 to 6 ratio which totals 24 parts.
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