Who is not allowed in the Meeting Hall in Philadelphia?​

b. She is shot by the Taliban.

Explanation:

Pakistani teen Malala Yousafzai was an ardent activist who became a huge supporter of female education in Pakistan. The Aljazeera profile article summarizes how the young girl became famous not only in her country but worldwide.

Despite Pakistan's strict ban on females getting an education, Malala began writing a blog detailing her daily life under the Taliban. Using a pen name "Gul Makai", she produced a number of diary entries that would later propel her to popularity. And these diary entries were published online leading to her being awarded several awards including Pakistan’s National Youth Peace Prize.

But this criticism of her life under the Taliban in Swat valley or the desire to get back to school was against the interest of the Taliban. And so, in October 2012, the Taliban shot her and a friend on the head, but which luckily did not kill them.

This incident sparked a huge outrage from the world community against the Taliban and also led Malala and her family to move to the UK.

Thus, the correct answer is option b. Because while the blog diary made her famous in Pakistan, she became famous worldwide because of the shooting.