Explanation:

- Zero: Aryabhatta did significant work in mathematics, but the concept of zero as a number is more commonly attributed to later Indian mathematicians, especially Brahmagupta.

- Theory of Atom: The theory of atoms in the ancient world is mainly credited to ancient Greek philosophers like Democritus and Leucippus, and in India, it was discussed by philosophers like Kanada. Aryabhatta did not develop a theory of atoms.

- Correct Answer

- Theory of Eclipses: Aryabhatta correctly explained the causes of solar and lunar eclipses scientifically, moving away from the mythological explanations prevalent in his time.

- Value of pi: Aryabhatta calculated an approximation for pi (\(\pi\)) as 3.1416, a remarkable achievement for his time.