Correct option is B
Transistor-Transistor Logic (TTL):
TTL is a logic family built from bipolar junction transistors (BJTs). It was widely used in applications such as computers, industrial controls, and consumer electronics.
PMOS Logic: PMOS logic uses p-channel enhancement mode metal–oxide–semiconductor field-effect transistors, and was dominant in the 1960s and 70s before being superseded by NMOS and CMOS.
NMOS Logic: NMOS logic uses n-type MOSFETs to implement logic gates and other digital circuits.
Emitter-Coupled Logic (ECL): ECL is a high-speed logic family that uses bipolar junction transistors in a differential amplifier configuration, known for its speed but also higher power consumption.
