Step 1: Understanding Section 66A and the Case.
Section 66A of the Information Technology Act, 2000, criminalized the sending of offensive messages through communication services, etc. This provision was struck down by the Supreme Court in *Shreya Singhal Vs Union of India* (2015) for being unconstitutional. The Court found the provision to be overly broad and vague, leading to violations of freedom of speech.
Step 2: Explanation of Other Options.
- (a) Justice K. S. Putta Swamy Vs Union of India relates to the right to privacy case, not Section 66A. - (b) M P Sharma Vs Satish Chandra deals with the legality of telephone tapping and the right to privacy, not Section 66A. - (d) Gagan Harsh Sharma Vs The State of Maharashtra does not relate to Section 66A.
Step 3: Conclusion.
The correct case is *Shreya Singhal Vs Union of India*, where the Supreme Court declared Section 66A unconstitutional.