It conceived as Ishvara, the personal and purely spiritual aspect of godhead, beyond all names and forms (nama-rupa), and is to be apprehended only by inner (mystical) experience
None of these
It is the concept of a formless God, which has no attributes or quality
It advocated the worshiped the anthropomorphic manifestations of the divine being, particularly Rama and Krishna
The twelve Alvars were Tamil poet-saints, who lived between 6th and 9th centuries AD and espoused 'emotional devotion' or bhakti to Visnu-Krishna in their songs
Only B
The 63 Alvars saints were the Shiva devotional poets, who lived between 5th and 10th centuries