This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bronchopulmonary Segments, Embryonic veins, Subject name: Anatomy
NOT true about right atrium: 
Select and explain. 
A. Fossa ovalis represent remnant of foramen ovale, B. Anterior and posterior pas are divided by Crista terminalis, C. Anterior pa is derived from absorption of right horn of sinus venosus, D. Posterior pa is smooth
C: Anterior pa is derived from absorption of right horn of sinus venosus
Answer: C: Anterior pa is derived from absorption of right horn of sinus venosus 
Explanation: * Anterior (rough) pa of right atrium is derived from primitive atrium. * Posterior smooth pa (sinus venarum) is derived from absorption of right horn of sinus venosus. * Crista terminalis is the boundary line between the rough and smooth pas. On outer surface this demarcation is known as sulcus terminalis * Fossa ovalis represents remnant of foramen ovale * limbus fossa ovalis is remnant of septum secundum