Who was among the following Bhakti saints gave a new orientation of Hinduism through his doctrine of Advaita or Monism?

Q. Who was among the following Bhakti saints gave a new orientation of Hinduism through his doctrine of Advaita or Monism?

A.            Ramanuja

B.            Sankara

C.            Guru Nanak

D.            Chaitanya

Answer: Sankara