Passage: Konrad Adenauer was born as the third of five children of Johann Konrad Adenauer (1833–1906) and his wife Helene (née Scharfenberg; 1849–1919) in Cologne, Rhenish Prussia, on 5 January 1876. His siblings were August (1872–1952), Johannes (1873–1937), Lilli (1879–1950) and Elisabeth, who died shortly after birth in c. 1880. One of the formative influences of Adenauer's youth was the Kulturkampf, an experience that as related to him by his parents left him with a lifelong dislike for "Prussianism", and led him like many other Catholic Rhinelanders of the 19th century to deeply resent the Rhineland's inclusion in Prussia.In 1894, he completed his Abitur and began studying law and politics at the universities of Freiburg, Munich and Bonn. In 1896, at the age of 20, he was conscripted into the German army, but did not pass the physical exam due to chronic respiratory problems he had experienced since childhood. He was a member of several Roman Catholic students' associations under the K.St.V. Arminia Bonn in Bonn. He graduated in 1900, and afterwards worked as a lawyer at the court in Cologne.

Question: Which religious student organizations was he a part of?
Roman Catholic