Read the passage and answer the question :

"Perhaps the most unique features of the Harappan civilisation was the development of urban centres. They had citadel and the lower towns. One of the most distinctive features of Harapppan cities was the carefully planned drainage system. The roads intersected at right angles and were well planned."

Identify the 'pattern' in which the roads and streets were planned during the Harappan civilisation.

Grid pattern

The correct answer is Option (3) → Grid pattern

Features of the Harappan settlement:

The Harappan settlement is divided into two sections, one smaller but higher and the other much larger but lower. Archaeologists designate these as the Citadel and the Lower Town respectively. The Citadel owes its height to the fact that buildings were constructed on mud brick platforms. It was walled, which meant that it was physically separated from the Lower Town.

The Lower Town was also walled. Several buildings were built on platforms, which served as foundations. It has been calculated that if one labourer moved roughly a cubic metre of earth daily, just to put the foundations in place it would have required four million person-days, in other words, mobilising labour on a very large scale.

Consider something else. Once the platforms were in place, all building activity within the city was restricted to a fixed area on the platforms. So it seems that the settlement was first planned and then implemented accordingly. Other signs of planning include bricks, which, whether sun-dried or baked, were of a standardised ratio, where the length and breadth were four times and twice the height respectively. Such bricks were used at all Harappan settlements. One of the most distinctive features of Harappan cities was the carefully planned drainage system. If you look at the plan of the Lower Town you will notice that roads and streets were laid out along an approximate “grid” pattern, intersecting at right angles. It seems that streets with drains were laid out first and then houses built along them. If domestic waste water had to flow into the street drains, every house needed to have at least one wall along a street.