Which engineer and inventor, born in 1859 in the Urals, demonstrated the first practical radio receiver in 1895 and is credited in his home country as the inventor of radio?

• A Vladimir Zworykin
• B Leon Theremin
• C Sergei Korolev
• D Alexander Popov ✓

Alexander Popov presented a lightning-detector radio receiver on 7 May 1895, a date celebrated annually as Radio Day in his home country.