The correct answer is 1966 - 69. Important Notes: • There were three annual plans between 1966 and 1969. • This period was also called ‘plan holiday’. • Plan Holidays' main reason was later deducted as war (Indo-Pakistan), inflation, and the severe drought. • In a bid to increase the exports in the country, the government declared devaluation of the rupee. • The Fourth Five-Year Plan was introduced only in 1969. Related Concepts: • On 9 July 1951, India’s first Prime Minister Jawaharlal Nehru presented the First Five-Year Plan to the Parliament. • The Niti Aayog has replaced the Planning Commission by the Modi Cabinet and launched three-year action plans from April 1, 2017, onwards. • The 12th five-year plan is considered as the last five-year plan of India. • Its duration is from 2012 to 2017, under the leadership of Manmohan Singh. • The theme is “Faster, More Inclusive and Sustainable Growth”.