Q. Which type of seals were most common in Indus Valley Civilization?
Answer: Quadrate
Notes: Square or rectangular (quadrate) seals with carved motifs were the most popular type of seal used by Indus Valley communities. Made of steatite, thousands of such seals have been found during excavations of Harappan sites. They were probably used as identity markers or tokens of authority. Cylindrical seals have also been found which were probably used to make impressions on goods or containers used in trade to signify official administrative seals.