The correct answer is: B. TTL
TTL (transistor-transistor logic) is a type of digital logic circuit that uses bipolar transistors as the active components. It is the most widely used bipolar family of logic circuits. TTL circuits are characterized by their high speed, low power consumption, and wide range of operating voltages.
DTL (diode-transistor logic) is a type of digital logic circuit that uses diodes and transistors as the active components. It is less widely used than TTL, but it is still used in some applications where low power consumption is important.
ECL (emitter-coupled logic) is a type of digital
logic circuit that uses emitter-coupled transistors as the active components. It is the fastest type of bipolar logic circuit, but it also consumes the most power.MOS (metal-oxide-semiconductor) logic is a type of digital logic circuit that uses metal-oxide-semiconductor field-effect transistors (MOSFETs) as the active components. It is the most widely used type of logic circuit today, and it is characterized by its low power consumption and high speed.
None of the above is the correct answer.