Pick up the correct statement regarding the centre line method of estimating a building?

A. Product of the centre line of the walls and area of cross-section of any item, gives total quantity of the item
B. The centre line is worked out separately for different sections of walls of a building
C. The centre line length is reduced by half the layer of main wall joining the partition wall
D. All the above
✅ The correct answer is option D.

Pick up the incorrect statement from the following ?

A. No deduction is made for the volume occupied by reinforcement
B. No deduction is made for the openings upto 0.1 sq.m
C. No deduction is made for volumes occupied by pipes, not exceeding 100 sq.cm in cross-section
D. None of these
✅ The correct answer is option D.