This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Branches of R.C.A. (Rt. Coronary aery): 
Select and explain. 
A. Obtuse marginal, B. Acute marginal, C. Diagonal, D. All
B: Acute marginal
Answer: B: Acute marginal 
Explanation: B. i.e. Acute marginal