The minimum acceptable input value for Logic 1 in TTL logic is _____.

Correct option is B

In TTL (Transistor-Transistor Logic), the voltage levels for inputs and outputs are standardized as follows:
Logic 1 (High):
The minimum acceptable input voltage for a Logic 1 is 2.0 V.
Any voltage at the input above 2.0 V is interpreted as a Logic 1.
Logic 0 (Low):
The maximum acceptable input voltage for a Logic 0 is 0.8 V.
Any voltage below 0.8 V is interpreted as a Logic 0.