The correct options are
A Chandragupta was the father of Bindusara.
D Bindusara was the father of Ashoka.
Chandragupta was the founder of Maurya dynasty, ruled from 321 B.C.E to 298 B.C.E. After Chandragupta, his son Bindusara became the emperor, he ruled from 298 B.C.E to 273 B.C.E. Later, Bindusara's son Ashoka became the emperor.