Which statement correctly explains the aspect “Alternatives in coordination” in the example “زَيْدٌ شَاعِرٌ لَا كَاتِبٌ”?

Qasr by Coordination, Negation–Exception, and Innamā

• Innamā and the listener — I am but a human like you.
• Alternatives in coordination — Zayd is a poet, not a writer.
• Coordination versus innamā — Zayd is a poet, not a writer / Zayd is only a poet.
• Coordination and qasr al-ifrād — Zayd is a poet, not a writer.