Which cosmonaut, flying aboard Vostok 1 on 12 April 1961, became the first human being to orbit the Earth?

• A Gherman Titov
• B Yuri Gagarin ✓
• C Alexei Leonov
• D Valentina Tereshkova

Gagarin's 108-minute flight made him an international hero; 12 April is celebrated annually as Cosmonautics Day and globally as the International Day of Human Space Flight.