Which one of the following statements about the Harappan Culture is no

Which one of the following statements about the Harappan Culture is not correct?

It witnessed the first cities in the subcontinent.
It marks the first use of script, written from right to left.
It marks the earliest known use of iron as a medium for the art of sculpting.
It marks the earliest known use of stone as a medium for the art of sculpting.
This question was previously asked in
UPSC CDS-2 – 2017
The statement that Harappan Culture marks the earliest known use of iron as a medium for the art of sculpting is incorrect.
The Harappan Civilization belongs to the Bronze Age (roughly 3300โ€“1300 BCE). While they were skilled in working with copper, bronze, gold, and silver, they had no knowledge of iron. The use of iron in the Indian subcontinent became widespread much later, during the Iron Age, which typically began around 1000 BCE (corresponding to the later Vedic period). Harappan art includes sculptures in stone (like the ‘Priest King’ and dancing girl torso), bronze (like the ‘Dancing Girl’), terracotta, and steatite.
Statements A, B, and D are correct about the Harappan Culture. It is the first urban civilization in the subcontinent. The Indus script is considered one of the earliest scripts used in the region, and while undeciphered, evidence from seals suggests writing was typically from right to left. The Harappans did use stone and other materials for sculpting, marking an early instance of this art form in the subcontinent.