إِنَّ جَهَنَّمَ كَانَتْ مِرْصَادًا ۝٢١ لِّلطَّـٰغِينَ مَـَٔابًا ۝٢٢ Which analysis correctly describes مَـَٔابًا?

Surah An-Naba — Part 3

• A genitive noun after لِـ
• The subject of كَانَتْ
• An accusative predicate of the preceding كَانَتْ
• An adjective of ٱلطَّـٰغِينَ