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: Skin
Poor prognostic factor for melanoma is: March 2013 
Select and explain. 
A. Size of tumour, B. Spread to lymphatics, C. Shape, D. Colour of tumour
B: Spread to lymphatics
Answer: B: Spread to lymphatics 
Explanation: Ans. B i.e. Spread to lymphatics