Which surah is called “al-Muʾmin” in this source?

Exceptional Qur’anic Passages, the Five Sciences, and Outward–Inward Understanding

• Sūrat al-Muʾminūn
• Sūrat Ghāfir, also known as al-Muʾmin
• Sūrat al-Munāfiqūn
• Sūrat al-Falaq