The correct answer is 35:1.

•  The student-teacher ratio at the upper primary level in schools under the Right to Education (RTE) Act should be 35:1.
• Every child of the age of six to fourteen years shall have a right to free and compulsory education in a neighborhood school till completion of elementary education.
  • Where a child above six years of age has not been admitted in any school or though admitted, could not complete his or her elementary education, then, he or she shall be admitted in a class appropriate to his or her age, no child shall be liable to pay any kind of fee or charges or expenses which may prevent him or her from pursuing and completing the elementary education.

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• Right of Children to Free and Compulsory Education Act, 2009
  • The Right of Children to Free and Compulsory Education Act or Right to Education Act (RTE) is an Act of the Parliament of India enacted on 4 August 2009.
  • It describes the modalities of the importance of free and compulsory education for children between the age of 6 to 14 years in India under Article 21A of the Indian Constitution.
  • India became one of 135 countries to make education a fundamental right of every child when the act came into force on 1 April 2010.
  • The title of the RTE Act incorporates the words ‘free and compulsory’.
    • ‘Free education’ means that no child, other than a child who has been admitted by his or her parents to a school which is not supported by the appropriate Government, shall be liable to pay any kind of fee or charges or expenses which may prevent him or her from pursuing and completing elementary education. 
    • ‘Compulsory education’ casts an obligation on the appropriate Government and local authorities to provide and ensure admission, attendance, and completion of elementary education by all children in the 6-14 age group.