Concept:The Three Language Formula is India's policy for language instruction in schools, aiming to balance mother tongue, Hindi, English, and regional languages.
Explanation:It is a language-in-education policy for school education.
The formula requires study of three languages: first language (mother tongue/regional language), second language (English or Hindi), and third language (another modern Indian language taught later).
In Hindi-speaking states, second language is English or another modern Indian language.
In non-Hindi-speaking states, second language is Hindi or English.
The third language is introduced at a later stage for a shorter duration.
This policy addresses India's linguistic diversity and promotes multilingual competence.
Answer:A. the language-in-education policy for school education.