فَإِنَّ ٱلْجَحِيمَ هِىَ ٱلْمَأْوَىٰ ۝٣٩ What is the grammatical role of ٱلْجَحِيمَ after إِنَّ?

Surah An-Nazi‘at — Part 5

• The direct object of إِنَّ
• The predicate of إِنَّ
• A preposition
• The accusative noun of إِنَّ