The Right to Education became a fundamental right in India through:

The 86th Constitutional Amendment
An act of Parliament
A Supreme Court judgment
The Directive Principles of State Policy

The Right to Education became a fundamental right in India through the 86th Constitutional Amendment. The amendment was passed in 2002 and came into effect in 2009. It inserted a new Article 21A into the Constitution, which guarantees free and compulsory education to all children aged 6 to 14 years. The amendment also made changes to other articles of the Constitution, such as Article 45, which now states that the State shall provide early childhood care and education for all children until they complete the age of six years.

The 86th Constitutional Amendment was a landmark step in the realization of the Right to Education in India. It has led to a significant increase in the number of children enrolled in schools and has improved the quality of education. However, there are still many challenges that need to be addressed, such as ensuring that all children have access to quality education, regardless of their background or location.

The other options are incorrect. An act of Parliament is a law passed by the Parliament of India. A Supreme Court judgment is a decision made by the Supreme Court of India. The Directive Principles of State Policy are a set of principles that are included in the Constitution of India. They are not enforceable in a court of law.