Who Among the Following Scientists Discovered Radioactivity

Question

Who among the following scientists discovered radioactivity?
A) H. Becquerel
B) M. Curie
C) A. Einstein
D) E. Rutherford

Accepted Answer

Henri Becquerel discovered radioactivity in 1896 when he observed that uranium salts emitted rays that could penetrate through opaque objects and cause photographic plates to become exposed.