Second Generation computers were developed during
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1949 to 1955
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1965 to 1970
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1970 to 1990
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1956 to 1965
D
Correct answer
Explanation
Second Generation computers (1956-1965) used transistors instead of vacuum tubes. First Generation was 1949-1955, Third Generation was 1965-1970 (integrated circuits), and Fourth Generation was 1970 onwards (microprocessors).