Answer: 315 BC
Notes: Megasthenese arrived Patliputra in 315 BC. He was an ancient Greek historian, diplomat and Indian ethnographer and explorer in the Hellenistic period. He wrote the book 'Indica'. He described India in his book. He was the first person to leave a written description of India. He visited India during the reign of Chandragupta Maurya. He was a Greek ambassador of Seleucus Nictator I in the court of Chandragupta Maurya.
