Correct option is A
Centre Line Method:
In this method of estimation, the total center line length of walls in a building is first calculated, then the center line length is multiplied by the breadth and depth of the respective items to get the total quantity of that item.
This method is quick but requires special attention and consideration at the junctions meeting points of partition or cross walls, etc.
For rectangular, circular, and polygon (hexagonal, octagonal, etc.) buildings having no inter or cross walls, this method is quite simple.
Half the width is deducted at the junction points as it is considered twice while estimating through the centre line method.
