What was a major feature of urban planning in Harappan civilisation?

B. ग्रिड प्रणाली और drainage / Grid system and drainage

Step 1: Identify the concept: this is urban planning. Step 2: Harappan cities had planned streets and advanced drainage systems. Step 3: Exam note: remember grid pattern and drainage together.

Step 1: अवधारणा पहचानें: यह urban planning है। Step 2: Harappan cities में planned streets और advanced drainage system मिलता है। Step 3: परीक्षा नोट: grid pattern और drainage को साथ याद रखें।