Which statement correctly explains the aspect “Lākin and corrective contrast” in the example “مَا زَيْدٌ كَاتِبًا لَكِنْ شَاعِرٌ”?

Qasr by Coordination, Negation–Exception, and Innamā

• Scope and syntax — No one struck ʿAmr except Zayd.
• The composition of innamā — I am only a human.
• The coordinating method — Zayd is a poet, not a writer.
• Lākin and corrective contrast — Zayd is not a writer, but a poet.