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: Forensic Medicine
[{'content': 'Which of the following is TRUE about cadaveric lividity? \nSelect and explain. \nA. It occurs only in the dependent pas, B. It occurs only upto 3-4 hours after death, C. It occurs due to dilatation of aerioles, D. All these', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cadaveric lividity is the bluish-purple or purplish-red discolouration which appears under the skin in the most superficial layers of the dermis (rete mucosum) of the dependent pas of the body after death, due to capillo-venous distention. It is well developed within four hours and reaches a maximum between 6 to 12 hours and persists until putrefaction sets in. Ref: Essentials of Forensic Medicine and Toxicology by Narayan Reddy, 27th edition, Page 136-137.', 'role': 'assistant'}]