Answer :
The 'discrete' type is not a dial used on dial indicators, which generally have continuous rotations either clockwise, counterclockwise, or balanced. So the correct option is b. discrete.
Among the types of dials you mentioned for dial indicators, discrete is NOT a type of dial used. Dial indicators typically have a continuous clockwise or continuous counterclockwise movement, and some have balanced dials that can move in both directions. Discrete dials are not recognized in the context of dial indicators as these tools usually rely on continual measurement scales for precision.
Continuous clockwise, discrete, and balanced are types of dials used on dial indicators, but continuous counterclockwise is NOT a type of dial used on dial indicators. Continuous counterclockwise movement is not a standard feature in dial indicators. So the correct option is b. discrete.
