Explanation:

Solution & Explanation:

The city known as the "City of Gold" is Johannesburg, South Africa.

Reason:

• Johannesburg is famous for its rich history in gold mining.
• It was established during the gold rush of 1886 and remains one of the world's leading producers of gold.
• The city has numerous gold mines and is central to South Africa’s gold industry.

Incorrect Options:

1. Rome – Known as the "Eternal City," not related to gold.
2. Delhi – A historical city but not known for gold.
3. Sydney – A major city in Australia but not associated with gold mining.

Final Answer:

 Option (1) - Johannesburg