An Obese 64 Year-Old Man Who Has Just Completed an All-Night

An obese 64 year-old man who has just completed an all-night train ride is brought to the emergency department with chest pain, shortness of breath, profuse sweating, and swelling of his right calf with a bluish discoloration. What is the most likely diagnosis?

A) Myocardial infarction with edema due to congestive heart failure
B) Cellulitis of his lower extremity with septic shock
C) Deep vein thrombosis and pulmonary embolus
D) Disseminated lung cancer with lymphatic obstruction