The correct answer is c) Periplus of the Erythraean Sea.
The Periplus of the Erythraean Sea is an anonymous 1st-century CE Greek text that describes the geography and trade of the Indian Ocean region. It is the earliest known European source to mention trade between Tamil kingdoms and the Roman Empire.
The Rigveda is an ancient Indian collection of Vedic Sanskrit hymns. It is one of the four sacred texts of Hinduism, and is considered to be the oldest Veda. The Rigveda does not mention trade between Tamil kingdoms and the Roman Empire.
The Arthashastra is an ancient Indian treatise on statecraft, economic policy, military strategy, and international relations. It is attributed to the Mauryan emperor Chandragupta Maurya (reigned c. 321â297 BCE). The Arthashastra does not mention trade between Tamil kingdoms and the Roman Empire.
The Mahabharata is an ancient Indian epic poem. It is one of the longest epic poems in the world, with over 100,000 verses. The Mahabharata does not mention trade between Tamil kingdoms and the Roman Empire.