Which sentence correctly means ‘Two Muslims helped’?

Explicit Noun Subjects in Verbal Sentences

• نَصَرَا الْمُسْلِمَانِ
• نَصَرَ الْمُسْلِمَيْنِ
• نَصَرَ الْمُسْلِمَانِ
• نَصَرَتِ الْمُسْلِمَانِ