पहली पीढ़ी के कंप्यूटर का मुख्य घटक था , Chief component of first generation computer was

Solution

B. Vacuum Tubes and Valves

Explanation

Transistors were used for second generation computers and integrated circuits in third generation. First generation computers used vacuum tubes and valves as their main electronic component. Vacuum Tubes were invented by Lee DeForest in 1908.