Step 1: Understanding the Concept:
The question asks to identify the article in the Constitution of India that guarantees the fundamental right to freedom of speech and expression.
Step 2: Detailed Explanation:
The fundamental rights are enshrined in Part III of the Indian Constitution. Let's look at the given articles:
- Article 15: Prohibits discrimination on grounds of religion, race, caste, sex, or place of birth.
- Article 16: Guarantees equality of opportunity in matters of public employment.
- Article 17: Abolishes "Untouchability" and forbids its practice in any form.
- Article 19: Guarantees six fundamental freedoms to all citizens of India. Specifically, Article 19(1)(a) states that all citizens shall have the right "to freedom of speech and expression". This right is subject to reasonable restrictions outlined in Article 19(2).
Step 3: Final Answer:
The 'Freedom of speech and expression' is guaranteed under Article 19 of the Constitution of India. Therefore, option (D) is the correct answer.