Final answer:
Guru Ramdas Ji was the son of Bibi Bhani and Guru Amar Das Ji, making them his parents. He was the fourth Sikh Guru, following the lineage after his father-in-law, Guru Amar Das Ji.
Step-by-step explanation:
The parents of Guru Ramdas Ji are B) Bibi Bhani and Guru Amar Das Ji. Guru Ramdas Ji was the fourth Sikh Guru and he succeeded his father-in-law, Guru Amar Das Ji. Bibi Bhani, his mother, was the daughter of Guru Amar Das Ji. Therefore, the correct answer to the question is option B, Bibi Bhani and Guru Amar Das Ji.