The correct option is C Ancient coins were made of gold and silver.
Since the early days, people have been using coins as a medium of exchange. These coins had a fixed weight and value. In addition, these had an official seal as the mark of the government that minted the coin, and as a guarantee of its value.
After independence, the Indian rupee replaced various types of coins. Today, the Indian government authorises the Indian coins, and these coins carry the seals of the Indian government. Notably, ancient coins were made out of gold, silver, and copper, whereas modern coins are made out of cupro–nickel.