Which cited example licenses an indefinite topic through supplication?

Mubtadaʾ and Khabar — Definition and Foundational Rules

• مَا أَحَدٌ خَيْرٌ مِنْكَ
• أَرَجُلٌ فِي الدَّارِ
• سَلَامٌ عَلَيْكَ
• زَيْدٌ قَائِمٌ