Answer: Option A
Answer: (a)
The Rolling plan concept in National planning was introduced by the Janata Party government.
Fifth FYP was launched and planned for the period 1974-79 but Janata government came in power in 1978 and ended the plan prematurely in 1978. The Janata government launched the sixth FYP for period 1978- 1983.
Congress government when came to power in 1980 abandoned the sixth FYP and launched a new sixth FYP for the period 1980-1985. The plan for period, 1978-80, is called the rolling plan.