Though forced from his Indian holdings, Seleucus Nikator and his successors
A) Attempted to seize them back when Ashoka succeeded to the throne.
B Executed the visionary Mahavira when they seized his monastery at Karnataka.
C) Sent their ambassador Megasthenes to convert the Indians to the worship of Zeus.
(D) Maintained cordial relations with the Mauryas.

Seleucus Nicator and his successors maintained friendly relations with the Mauryas, exchanged territories, and promoted ethical governance, including non-violence and compassion.

Explanation:

Seleucus Nicator and his successors maintained cordial relations with the Mauryas despite being defeated by Chandragupta, which led to the surrender of territories in northwest India. The treaty between Seleucus and Chandragupta allowed for the exchange of elephants and established friendly ties.

Seleucus gave Indian territories back, including the Indus Basin, to Indian princes in return for elephants in 310 BCE. The Hellenistic Seleucid kingdom continued to trade with India and spread Greek ideas even after losing control over the region.

King Ashoka of the Mauryan Empire later focused on ethical governance, promoting non-violence, impartial justice, and compassion through his edicts and policies.

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