The correct option is 1 and 3 only
Explanation
Harappan seals are among the most distinctive artifacts of the Indus Valley Civilization, serving primarily commercial and administrative functions, such as authenticating goods and property.
Statement 1 is Correct: The majority of Harappan seals were made of a soft stone called steatite (soapstone). While seals made of agate, chert, copper, faience, and terracotta have also been found, steatite was the most common material due to its workability.
Statement 2 is Incorrect: Harappan seals are renowned for their intricate carvings of animal motifs. Common animals depicted include the one-horned rhinoceros (unicorn), tiger, elephant, buffalo, bison, goat, and crocodile. The "Pashupati Seal" depicts a figure surrounded by animals.
Statement 3 is Correct: Most seals contain a line of writing in the Harappan script. This script is pictographic in nature and, to date, remains undeciphered. Scholars have not yet been able to assign specific phonetic values or meanings to the signs.
Key Takeaway: Harappan seals are typically square-shaped, made of steatite, feature animal motifs, and contain an undeciphered script used for trade and identification.