Which example loses nūn through iḍāfah?

Ism al-Tafḍīl: Formation, Comparison, Agreement and Parsing

• Aṭ-ṭālibāni al-afḍalāni
• Aṭ-ṭālibāni afḍalu min Zaydin
• Aṭ-ṭālibāni afḍalā al-qawmi
• Zaydun al-afḍalu