हड़प्पा सभ्यता में मनके (beads) बनाने के लिए मुख्य रूप से किस सामग्री का उपयोग किया जाता था?

Which one of the following animals was not reared or domestically maintained by the Harappans according to established archaeological evidence?

The cities of the Harappan Civilisation were constructed using standardized burnt bricks with a uniform ratio of thickness, width, and length. What was this ratio?