The correct answer is (c) 1981-1991.
The percentage of literates in India increased from 36.2% in 1981 to 52.2% in 1991, an increase of 43.4%. This was the highest percentage increase in literacy in India’s history.
There are several reasons for this increase in literacy. One reason is that the Indian government has made education a priority, and has invested heavily in education programs. Another reason is that the economy has grown, and more people have been able to afford to send their children to school. Finally, there has been a growing awareness of the importance of education, and more people have come to believe that education is essential for success in life.
The increase in literacy has had a number of positive effects on India. It has led to a more educated workforce, which has helped to boost economic growth. It has also led to a more informed citizenry, which has helped to strengthen democracy. And it has led to a more empowered population, which has helped to reduce poverty and improve social welfare.
However, there are still challenges to be addressed. The literacy rate in India is still relatively low, and there are large disparities in literacy rates between different states and between different social groups. The government will need to continue to invest in education in order to ensure that all Indians have access to quality education.