Which statement correctly explains the aspect “The composition of innamā” in the example “إِنَّمَا أَنَا بَشَرٌ”?

Qasr by Coordination, Negation–Exception, and Innamā

• The composition of innamā — I am only a human.
• Affirmed and negated sides of lā — Zayd is standing, not sitting.
• Comparing lā, bal and lākin — Lā, bal and lākin.
• Scope and syntax — No one struck ʿAmr except Zayd.