Final answer:
The literature referred to as the Farsi Quran is the Masnavi by Rumi, a revered work of Persian Sufi literature known for its spiritual depth.
Step-by-step explanation:
The piece of literature sometimes referred to as the Farsi Quran (Persian Quran) is b) Masnavi by Rumi. This is a vast poetic work by Jalal ad-Din Muhammad Rumi, also known as Mevlana or Mawlana, which comprises six books and has been revered in Persian culture for its spiritual depth and literary beauty. While the Quran is the holy book of Islam, the Masnavi is often held in similar high regard for its teachings on Islamic spirituality and philosophy. Rumi's work, written in rhyming couplets, addresses the themes of divine love, ethics, and the relationship between the individual and the divine. Unlike the Quran, which is considered the literal word of God in Islamic belief, Rumi's Masnavi is a significant work of Sufi literature, exploring Sufism's mystical and ethical dimensions through poetry.