Marie Curie was a Polish and naturalized-French physicist and chemist who conducted pioneering research on radioactivity. She was the first woman to win a Nobel Prize, the first person and only woman to win twice, the only person to win a Nobel Prize in two different sciences, and was part of the Curie family legacy of five Nobel Prizes. She was also the first woman to become a professor at the University of Paris, and in 1995 became the first woman to be entombed on her own merits in the Pantheon in Paris.

What is incorrect about Marie Curie?
a) She had a twin sister.
b) She know Physics.
c) She was born in an European country.
D) she did research about radioactivity.