What follows the sākin nūn in الْمَنْفُوشِ?

Al-Qāriʿah and Az-Zalzalah — Comparative Tajwīd Practice

• Khāʾ, causing iẓhār
• Fāʾ, so ikhfāʾ
• Rāʾ, causing idghām without ghunnah
• Bāʾ, causing iqlāb