- Tamil
- Kharshthi
- Unknown
- Brahmi
Answer: Option 3
It is not Known.Seals found during excavation of Indus Valley Civilization had symbolic (pictographic) script which has not been deciphered yet.The Indus script (also known as the Harappan script) is a corpus of symbols produced by the Indus Valley Civilisation during the Kot Diji and Mature Harappan periods between 3500 and 1900 BCE.