An important feature of the third five-year plan was:

Correct option is C

The Third Five-Year Plan (1961–1966) in India aimed to focus on self-reliance and establishing a foundation for long-term economic growth. One of its notable educational features was the emphasis on improving the quality of education, particularly in higher education. This included the establishment of examination research units in some universities to reform the examination system and ensure it better aligned with the needs of students and the nation.
The setting up of examination research units was aimed at improving evaluation methods and reducing rote learning in universities.
These units contributed to the enhancement of educational standards by researching better ways to assess student performance.
Information Booster:
Objectives of the Third Five-Year Plan:
Emphasis on agriculture to ensure food security.
Expansion of education with qualitative improvements.
Development of heavy industries and power generation.
Focus on Education:
Improving the quality of higher education.
Research on examination reforms.
Expansion of primary education to reduce illiteracy.
Examination Research Units:
Aimed to make the evaluation system more scientific and meaningful.
Helped reduce rote learning by suggesting innovative methods of assessment.