The correct answer is: C. 4004
The Intel 4004 was the first microprocessor, and was released in 1971. It was a 4-bit microprocessor, which means that it could process 4 bits of data at a time. It was used in calculators and other small electronic devices.
The Intel 8008 was released in 1972, and was an 8-bit microprocessor. It was used in early personal computers, such as the Altair 8800.
The Intel 8080 was released in 1974, and was an 8-bit microprocessor that was used in many early personal computers, such as the Apple II and the Commodore PET.
The Intel 8800 was never released. It was a 16-bit microprocessor that was in development in the early 1970s, but was cancelled before it was released.
The Intel 4004 was a revolutionary product that changed the world of computing. It was the first microprocessor, and it paved the way for the development of personal computers and other electronic devices.