<prompt> Malignant change in nevus is characterised by-a Darkeningb Hemorrhagec Itchingd Increase in Sizeabcdbdac  <response>: Warning size of melanoma are : -Itching or pain in a pre-existing mole.Enlargement of a pre-existign lesion.Irregularity of the borders of a pigmented lesion.Variegation of color within a pigmented lesion.Assymetry of lesions. 