Which of the following electronic technologies is the key technology for making the Personal Computer (PC) in the 1970s?

Correct option is C

The microprocessor was the key technology that made the development of the Personal Computer (PC) in the 1970s possible. The introduction of the microprocessor, which integrated a computer's central processing unit (CPU) onto a single chip, drastically reduced the size and cost of computers, enabling the creation of PCs.
Information Booster:
1. The Intel 4004, developed in 1971, was the first commercially available microprocessor.
2. Microprocessors combined computational power with a small footprint, making PCs affordable and compact.
3. Early PCs, such as the Altair 8800 (1975) and Apple I (1976), were based on microprocessor technology.
Additional Knowledge:
· Transistor based: Key to the development of second-generation computers in the 1950s, preceding microprocessors.
· Integrated components (ICs) based: Used in third-generation computers in the 1960s, but PCs in the 1970s relied on microprocessors.
· Vacuum tube based: Part of first-generation computers in the 1940s and 1950s, much earlier than PCs.