Correct Answer : Option (C) : High, Low, float
Explanation : The three or tri-state conditions of a three-state buffer are High, Low, and float. A three-state buffer refers to a state buffer that' output can be made high impedance in addition to high or low logic states. It is useful in a condition where you have more than one output on a given line. For example, a multi-drop communication bus. If the 3-state control input is 1, then output is electrically isolated/disconnected or floated. It is as if a very high impedance of 10 Megaohms is inserted between the output pin and internal circuit. Now output pin can be set to 0 or 1 by any other output signal connected to the output.
