As per one of the criteria evolved by Government to determine declaration of a language as a Classical language, the language must have high antiquity of its early texts/recorded history over a period of years.

Correct option is C

The correct answer is (C)  ​1500 - 2000

• ​The language must have early texts and recorded history dating back 1,500–2,000 years.
  

Information booster:

​The Government of India recognizes a language as a classical language based on specific criteria, including:

• Cultural Heritage: Ancient literature and texts of the language should be considered a valuable legacy passed down through generations.
• Literary Originality: The language’s literary tradition should be original and not heavily influenced by another speech community.
• Distinct Identity: The language and its literature should differ significantly from its modern forms and may have limited continuity with later variants or offshoots.
• Diverse Texts: The language should include a variety of texts such as knowledge-based works, prose, poetry, inscriptions, and epigraphical evidence.
  

Languages given the status of classical languages receive special support from the Ministry of Education.

• National Awards recognizing contributions to classical languages.
• Establishment of Chairs in Universities to facilitate teaching and research.
• Creation of Centers for the Promotion of Classical Languages to preserve and promote their heritage.

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