Which region was known for being the best source of 'lapis lazuli', a highly valued blue stone in the Harappan Civilisation?

Shortughai

The correct answer is option 3- Shortughai.

The Harappans employed various strategies to procure materials for craft production. They established settlements in specific locations where certain resources were available. For example, Nageshwar and Balakot were settled near areas abundant in shell, while Shortughai in Afghanistan was close to the source of lapis lazuli, a highly valued blue stone. Lothal was strategically located near sources of carnelian, steatite, and metal.