The correct options are
A Rishabha
B Parshvanatha
In Jainism, Tirthankaras were believed to be the saviours who have succeeded in crossing over life’s stream of rebirths and have made a path for others to follow. Rishabha was the first Tirthankara, while Parshvanatha was believed to be the predecessor of Mahavira. Siddhartha, was the name given to Gautama Buddha. Dhana Nanda was the last ruler of the Nanda dynasty. He was defeated by Chandragupta Maurya, the founder of Mauryan empire.