Explanation:

Option 1 states that the Harappan Culture witnessed the first cities in the subcontinent, which is correct. The Harappan Civilization, which existed from approximately 2600 BCE to 1900 BCE, was known for its well-planned cities such as Mohenjo-daro and Harappa. These cities had advanced urban planning, with well-constructed houses, public baths, and drainage systems.

Option 2 states that the Harappan Culture marks the first use of script written from right to left, which is also correct. The Harappan script, known as the Indus script, was discovered on various artifacts and seals. It is one of the oldest known scripts and is written from right to left.

Option 3 states that the Harappan Culture marks the earliest known use of iron as a medium for the art of sculpting. This statement is not correct. The Harappan Culture mainly used materials such as stone, terracotta, and metal (such as copper and bronze) for their sculptures and artwork. Iron was not commonly used during that time.

Option 4 states that the Harappan Culture marks the earliest known use of stone as a medium for the art of sculpting, which is correct. The Harapp