Correct option is D
A bevel gauge (also called a sliding bevel) is a simple layout tool used to transfer or copy angles from one surface to another. It consists of a blade that can be adjusted and locked at any desired angle relative to the stock (handle). However, an important limitation of a bevel gauge is that it does not have any graduated scale, so it cannot measure or read the exact value of an angle. It is mainly used when you need to duplicate an angle rather than determine its numerical value.
In contrast, a bevel protractor is a precision measuring instrument used to measure and set angles accurately. It is equipped with a graduated circular scale (usually in degrees) and often includes a vernier scale for high accuracy, sometimes up to minutes of arc. This makes it highly useful in engineering, machining, and inspection work where exact angular measurement is required.
