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: Pathology
Most impoant growth factors in angiogenesis ? 
Select and explain. 
A. PDGF, B. TGF alpha, C. TGF beta, D. Ang I
D: Ang I
Answer: D: Ang I 
Explanation: Ans. is 'd i.e., Ang I