Step 1: Understanding the 86\textsuperscript{th} Constitutional Amendment
The 86\textsuperscript{th} Constitutional Amendment Act of 2002 introduced Article 21A to the Indian Constitution. This article established education as a fundamental right for children between 6 and 14 years old, a significant step towards universal education in India.
Step 2: Analysis of options
- (1) Article 19: Guarantees freedom of speech and expression, but was not added by the 86\textsuperscript{th} Amendment.
- (2) Article 21 A: The correct answer. Inserted by the 86\textsuperscript{th} Amendment, it grants the right to education.
- (3) Article 51 A: Enshrines fundamental duties, which existed prior to the 86\textsuperscript{th} Amendment.
- (4) Article 100: Concerns the election procedure for the Speaker and Deputy Speaker and was not part of the 86\textsuperscript{th} Amendment.
Step 3: Conclusion
The correct answer is (2) Article 21 A.