Explanation:

- Option 1: Chandragupta Maurya

Seleucus was not a general of Chandragupta Maurya. Instead, he was a ruler of the Seleucid Empire and had interactions, including conflicts and treaties, with Chandragupta.

- Option 2: Dhan Nanda

Seleucus was not connected to Dhan Nanda, the last ruler of the Nanda dynasty in India. The two operated in different historical contexts.

- Option 3: Alexander

Seleucus I Nicator was indeed one of the leading generals under Alexander the Great. After Alexander's death, he became a prominent successor, establishing the Seleucid Empire.

- Option 4: None

This is incorrect, as Seleucus had a direct connection to Alexander as one of his generals.