Which of these passages from the Ramayana expresses the concept of dharma?
a."The king, his eyes filled with tears, his throat choked with emotion, could only utter the word 'Rama' and nothing more."
b."Without knowing the cause of the king's distress, Shri Rama became agitated like the sea on the day of the full moon."
c."Why should not man obey his parents, who are the source of his birth and who are living gods?"
d."Is my revered father suffering any physical or mental distress?"