<prompt> A person was found dead with bluish green frothy discharge at the angle of mouth and nostrils. What is the diagnosis ?Arsenic poisoningCopper poisoningMercury poisoningLead poisoning  <response>: Blue green or purple-green pigmentation of hair, skin, mucosa and perspiration, purple blue green line on gums and bluish green frothy discharge from mouth and nostrils is seen in chronic poisoning of copper salt. 