Explanation

Nirguna means “without attributes” — Nirguna Bhakti is devotion to a formless, attributeless God, as practised by saints like Kabir and Guru Nanak. Saguna Bhakti, by contrast, is worship of God with form and attributes, such as the Shaivite and Vaishnavite worship of Shiva, Vishnu and his incarnations. Options (A), (B) and (C) all describe Saguna worship. Hence (D) abstract form of God worship is correct.