Correct option is D
Megasthenes was a Greek ambassador sent to the court of Chandragupta Maurya by the Greek ruler Seleucus I Nicator of West Asia (Seleucid Empire).
The capital of Chandragupta Maurya’s empire, Pataliputra, impressed Megasthenes for its grandeur.
Chandragupta Maurya established the Mauryan Empire, which later became one of the largest empires in Indian history.
- He is known for his detailed accounts of the Mauryan Empire, particularly through his work Indica, which describes the administration, culture, and society of India under Chandragupta Maurya.
• Dionysius – He was the Greek ambassador sent to the court of Dhanananda’s successor, Dhamma or Bindusara, the son of Chandragupta Maurya.