In Ponniyin Selvan, when Arulmozhivarman (the future Rajendra Chola) fell into the Kaveri river as a child, he was saved by his father's first wife (Queen Vanavan Madevi). This is a childhood incident mentioned in the novel that establishes character relationships and backstories. Options A is a deity, B is his sister, and C is Nandini - none of whom saved him in this incident.