Pick up the incorrect statement from the following: A. In dog-legged stairs, no space between its flights is provided B. In open newel stair, a rectangular well is provided C. In geometric stair, a curved shaped well between forward and backward flights, is provided D. In geometrical stair, two quarter space landing is provided

The correct answer is D. In geometrical stair, two quarter space landing is provided.

A dog-legged stair is a type of stair that has two flights that wind around each other. The flights are connected by a landing, which is a flat platform. The well of a dog-legged stair is the space between the flights. It is usually rectangular in shape.

An open newel stair is a type of stair that does not have a solid wall on one side. The open side of the stair is usually enclosed by a railing. The well of an open newel stair is the space between the railing and the stairs. It is usually rectangular in shape.

A geometric stair is a type of stair that has a curved shape. The well of a geometric stair is the space between the flights. It is usually curved in shape.

A quarter space landing is a type of landing that is used to change the direction of a stair. It is usually a quarter of the width of the stair.

In conclusion, the incorrect statement is D. In geometrical stair, two quarter space landing is provided.