Match the following thinkers in List 1 correctly with the country to which they belonged in List 2:

(a)- ii, (b)- iii, (c)- iv, (d)- i

The mid-first millennium BCE is often regarded as a turning point in world history: it saw the emergence of thinkers such as Zarathustra in Iran, Kong Zi in China, Socrates, Plato and Aristotle in Greece, and Mahavira and Gautama Buddha, among many others, in India. They tried to understand the mysteries of existence and the relationship between human beings and the cosmic order.