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: Surgery
Breast Ca good prognostic markers are :a) ER +veb) Progesterone (receptors) +vec) HER- 2/neu (receptors) +ved) CD44 receptor +vee) p53 gene +ve 
Select and explain. 
A. ac, B. a, C. ab, D. bc
C: ab
Answer: C: ab 
Explanation: None