What does Telemachus learn about his father's whereabouts from King Nestor in Pylos?

That, after the Trojan War, Odysseus and Menelaus left ahead of Nestor and Agamemnon.

That Odysseus chose to return home before the Trojan War was over and was not heard from again.

That, after the Trojan War, Odysseus stayed behind with Agamemnon while Nestor returned with Menelaus.

That the two men were separated in battle during the Trojan War and Nestor never again saw Odysseus after they invaded the city.