Which country decided to ban social media access for children under 16 w.e.f Nov 2024?

Australia

The correct answer is option 4: Australia

In November 2024, Australia enacted legislation to ban social media access for children under the age of 16. This law, considered one of the world's strictest regulations targeting Big Tech, mandates that platforms such as Facebook, Instagram, TikTok, Snapchat, Reddit, and X prevent minors from creating accounts.