Step 1: Understanding the Hussainara Khatoon Case.
In this case, the Supreme Court of India emphasized the right to free legal aid as an essential right under Article 21 of the Constitution, which guarantees the right to life and personal liberty.
Step 2: Explanation of Other Options.
- (A) Right to Speedy Justice is also fundamental but was not the primary focus in this case.
- (B) Right to Clean Environment is a separate issue and was not discussed in this case.
- (D) None of these is incorrect because the right to free legal aid emerged as a key issue in this case.
Step 3: Conclusion.
The correct answer is (C), as the case recognized the right to free legal aid as a fundamental right.