Step 1: Understanding Pana coins. 
  
Pana was a coin used in ancient India, particularly during the Mauryan period. It was made of gold and was used as currency in trade and other transactions. 
Step 2: Analyzing the options. 
  
(A) Gold: Correct. Pana was primarily a gold coin used during ancient times. 
  
(B) Silver: Incorrect. While silver coins were used in ancient times, Pana was specifically made of gold. 
  
(C) Copper: Incorrect. Copper was used for other types of coins, but not for Pana. 
  
(D) Bronze: Incorrect. Bronze was not the metal used for Pana coins. 
Step 3: Conclusion. 
  
The correct answer is (A) Gold, as Pana coins were made of gold.