Q. Consider the following:

1. Uru Porul
2. Ulgu Porul
3. Onnartteru Porul

Which of the above types of revenue is derived from treasure-troves and land revenue?
Answer: Only 1
Notes: Uru Porul refers to revenue from treasure-troves and land, forming a part of the king's income. Ulgu Porul encompasses customs and tolls collected on trade items. Onnartteru Porul involves war booty and tributes received from conquered territories. Each type of revenue reflects different aspects of the economic structure in ancient Tamilakam, highlighting the importance of trade and conquest.