<prompt> A child presents with this hyperpigmented patch over the back since birth. The level of melanin in this patch on biopsy is likely to be-EpidermalDermoepidermal junctionSuperficial dermisDeep dermis  <response>: Ans. D. Deep dermisDeep dermis. Notice the bluish color which is so deep dermal melanin. The lesion is actually a Mongolian spot. 