Which of the following is not an example of cultural and scientific advancements made during the Gupta Empire?

The Gupta Empire is associated with cultural and scientific achievements such as the use of zero and an early form of chess. The Indian subcontinent was not unified for the first time under the Guptas; the Mauryan Empire had unified much of it earlier. Therefore, “the Indian subcontinent was unified for the first time” is not a Gupta cultural or scientific advancement.

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