Which one among the following generation computers used microprocessors in their hardware technology?

Computer generations are classified by their hardware technology. First generation used vacuum tubes; second generation used transistors; third generation used integrated circuits (ICs); fourth generation introduced microprocessors (VLSI technology) starting with the Intel 4004 in 1971, leading to personal computers; fifth generation focuses on artificial intelligence and ULSI/parallel processing. Therefore, microprocessors were first used in the hardware of fourth generation computers.