Which among the following was proposed by Kothari commission vis-a-vis language? 

The three language forumla was proposed by Kothari Commission.

Key Points Kothari Commission

• The Government of India established the National Education Commission, also known as the Kothari Commission, as an ad hoc commission with the mandate to review all facets of the Indian educational system, create a general framework for education, and suggest rules and policies for the advancement of education in the country.
• The Kothari Commission concentrated on girls' education, education for underprivileged groups, education for tribal people, and education for children with physical and mental disabilities in order to advance social justice.
• The four pillars of learning—learning to know, learning to do, learning to live together, and learning to be—should be the focus of curriculum reform if education is to accomplish its objectives.
• The Kothari Commission recommended that the concept of national reconstruction be linked with education.
• The Kothari Commission has made a significant contribution to education, strengthening and improving the effectiveness of the Indian educational system.