Correct Answer: 1978 to 1980

Solution : The correct option is 1978 to 1980 .

The term rolling plan in the context of Indian economic planning refers to a system of planning that was introduced in India during the 1970s. The rolling plan was essentially a series of annual plans designed to replace the earlier five-year plans.

The duration of the rolling plan in India was from 1978 to 1980. During this period, the Government of India followed a two-year planning cycle. The concept of rolling plans was introduced to provide more flexibility and adaptability in economic planning, given the rapidly changing economic and political situations during that time.