Adi Shankaracharya 's father was

Adi Shankaracharya's father was Shivaguru (also spelled Sivaguru), a devout Brahmin who performed extensive religious rituals to have a child. This is recorded in traditional biographies like the Shankara Vijayam. Option A (Narayana Guru) refers to a much later social reformer from Kerala. Option B (Shankara Guru) is incorrect - Shankara was the son's name. Option D (Govindapada) was actually Adi Shankaracharya's teacher (guru), not his father.