This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Most common abnormality of proto-oncogene in human tumours is 
Select and explain. 
A. p53 point mutations, B. Point mutation in RAS family gene, C. Point mutation in C-kit gene, D. Overexpression of RET proto-oncogene
B: Point mutation in RAS family gene
Answer: B: Point mutation in RAS family gene 
Explanation: .