This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Essential for tumor metastasis is - 
Select and explain. 
A. Angiogenesis, B. Tumorogenesis, C. Apoptosis, D. Inhibition of tyrosine kinase
A: Angiogenesis
Answer: A: Angiogenesis 
Explanation: Harshmohan textbook of pathology 7th edition. tumour angiogenesis play a very significant role in metastasis since the new vessels formed as apa of growing Tumor are more vulnerable to invasion because this evolving vessels are directly in contact with cancer..