Option d is the correct answer. While Bhakti saints like Kabir, Nanak, and Dadu are associated with the Nirguna School whereas Chaitanya Mahaprabhu belonged to the Saguna School of Bhakti. The Saguna School of Bhakti, which emphasized the worship of form, believed that God is the ultimate embodiment of perfection. Important Tips Nirgunabhakti: Believed in formless worship. Introduced by Adi Shankara. Preached by Bhakti saints like Kabir, Guru Nanak, Dadu Dayal, and others. Sagunabhakti: Believed in the worship of form. Believed that God is the ultimate manifestation of perfection. Included philosophers and saints such as Ramanuja, Nimbaraka, Madhva, Vallabha, Meera Bhai, Chaitanya Mahaprabhu, Tulsidas, Surdas, and others