The conversation between human and AI assistant.
[|Human|] Given this paragraph about the origin of zero, in which century did it first make an appearance in India?
[|AI|] In the 3rd/2nd century BC, by Pingala, for the first time in India, as "Sunya" in Sanskrit.
[|Human|] 
Given this paragraph about the origin of zero, in which century did it first make an appearance in India?