The 'Therigatha' primarily consists of verses composed by whom?

The correct answer is Option 4 - Bhikkhunis

The Therigatha, a distinctive Buddhist text found within the Sutta Pitaka, comprises verses composed by bhikkhunis. This collection offers a window into the social and spiritual journey of women. The narrative introduces Punna, a dasi or slave woman, who regularly visited the river every morning to fetch water for her master's household. During her visits, she frequently observed a Brahmana engaging in his bathing rituals.