A young college student is found in his dorm unconscious. He has tachyarrhythmia and high fever. He also seems to be bleeding from his nose, which on examination shows a perforated nasal septum. What is the most likely diagnosis?

Key is B. Cocaine overdose. [Tachyrhythmia, High fever and perforated nasal septum are suggestive features of cocaine overdose. Other features include dilated pupil, chest pain, anxiety, delirium, paranoia etc. Cocaine can even lead to death, which can occur due to a multitude of complications, including heart attack, seizure and stroke].