The correct answer is: All of the above.
Haryana region was under the reign of all three Mauryan kings: Chandragupta Maurya, Bindusara, and Ashoka.
Chandragupta Maurya was the founder of the Mauryan Empire in 321 BCE. He ruled over a vast empire that included much of the Indian subcontinent, as well as parts of Central Asia. Haryana was part of Chandragupta Maurya’s empire.
Bindusara was the son of Chandragupta Maurya and the second Mauryan emperor. He ruled from 298 BCE to 272 BCE. During his reign, the Mauryan Empire reached its peak of power and extent. Haryana was part of Bindusara’s empire.
Ashoka was the grandson of Chandragupta Maurya and the third Mauryan emperor. He ruled from 272 BCE to 232 BCE. He is best known for his Buddhist reforms and his reign of peace. Haryana was part of Ashoka’s empire.