What is the most significant aspect of the given picture.

1. Inverted lotus built at the top
2. Polished stone with lustre
3. Rustless wonder showing art of metallurgy reaching the pinnacle
4. The statue of Buddha at the top of pillar

Who was Fa-Hien, and during whose reign did he visit India?

Read the following excerpt and answer the question that follows:

"After declaring his independence in Magadha, he with the help of a matrimonial alliance with the Lichchhavis, enlarged his kingdom."

(Source: https://egyankosh.ac.in/bitstream/123456789/20162/1/Unit-32.pdf)

Whom did Chandragupta I marry to strengthen his rule?

Name two centres of learning during the Gupta period.