Pick up the correct statement from the following: Method of sawing timber A. Tangentially to annual rings, is known as tangential method B. In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method C. Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing D. All the above

The correct answer is D. All the above.

Tangential sawing is a method of sawing timber in which the saw blade cuts through the annual rings at an angle. This results in boards with a wavy grain pattern. Quarter sawing is a method of sawing timber in which the saw blade cuts through the annual rings at a 90-degree angle. This results in boards with a straight grain pattern. Radial sawing is a method of sawing timber in which the saw blade cuts through the medullary rays and perpendicular to the annual rings. This results in boards with a straight grain pattern and a high degree of stability.

Each method of sawing has its own advantages and disadvantages. Tangential sawing produces boards with a beautiful grain pattern, but the boards are not very stable and can warp easily. Quarter sawing produces boards that are very stable and resistant to warping, but the grain pattern is not as beautiful as that of tangentially sawn boards. Radial sawing produces boards that are both stable and have a beautiful grain pattern, but the process is more expensive than the other two methods.

The method of sawing that is best for a particular application depends on the desired aesthetic and functional properties of the finished product. For example, if you are making a piece of furniture that will be exposed to a lot of moisture, you would want to use quarter sawn wood because it is more stable. If you are making a piece of furniture that will be displayed in a dry environment, you could use tangentially sawn wood because it has a more beautiful grain pattern.