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
Malignant change in nevus is characterised by? 
Select and explain. 
A. Darkening, B. Hemorrhage, C. Itching, D. All
C: Itching
Answer: C: Itching 
Explanation: Ans. is 'c' i.e., Itching Warning size of melanoma are : ? i) Itching or pain in a pre-existing mole. ii) Enlargement of a pre-existign lesion. iii) Irregularity of the borders of a pigmented lesion. iv) Variegation of color within a pigmented lesion. v) Assymetry of lesions.