Who was Constantin II Șerban?

A. A prince of Wallachia with no known relation to Radu Şerban
B. A legitimate son of Radu Şerban and a prince of Moldavia
C. An illegitimate son of Radu Şerban and a prince of Wallachia
D. A legitimate son of Radu Şerban and a prince of Transylvania
Answer: 