<prompt> A child presents with white lesion depigmented macule of 2x 2 cm with irregular margin over forehead and glabella. There is white forelock over forehead since birth. Diagnosis is:PiebaldismDermatitisVitiligoNevus of Ito  <response>: Ans. a. PiebaldismWhite forelocks are also seen associated with warden burg syndrome 