Concept:The period 1965 to 1975 belongs to the third generation of computers.
Explanation:First generation computers (1942–1955) used vacuum tubes.
Second generation computers (1955–1964) used transistors.
Third generation computers (1964–1975) used integrated circuits (ICs).
Thus, 1965 to 1975 falls in the third generation era.
These computers were smaller, faster, and produced less heat than earlier generations.
Examples include IBM 360 and IBM 370.
Answer:B. Third generations computers