Step 1: Understand Fundamental Duties.
These remind citizens of their civic responsibilities. We need the Article that contains them.
Step 2: Identify the Article.
Fundamental Duties are in Article 51A, added by the 42nd Amendment Act, 1976, which created Part IV-A.
Step 3: How many.
Originally there were 10 duties. The 86th Amendment added the 11th.
Step 4: Rule out others.
Article 19 is a Fundamental Right. Article 21A is the Right to Education. Article 45 is a Directive Principle on early childhood education.
Step 5: Conclude.
Fundamental Duties are under Article 51A.
Answer: Article 51A