The correct answers are (A): Prince Vladimir arranged mass baptisms in Kiev. (B):Princess Olga converted to Roman Catholicism and (E): Missionaries from Constantinople came to Russia.
Christianity was introduced into the East Slavic state of Kievan Rus (Russia) by Greek missionaries from Constantinople come to Russia during the 9th century. In 957 princess Olga of Kiev converted to Christianity when the Constantinople missionaries baptized her. Olga's grandson Vladimir, the prince of Kiev, was then Baptized in 988, he as well arranged a mass baptism for his residents at river Dnieper. Thus this became the iconic event that led to Christianization of Kiev as well as evolution of the church of Russia.
C. 'pax' means peace in latin, and 'Romana' means Roman, so it literally translates to "Roman Peace", which was a time of create peace and a time when the cultures flourished. :)
Indira Gandhi was assassinated by her bodyguard due to golden temple dispute. her bodyguard was not happy with her decision to let army go in Golden temple
