This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and postmortem changes, Subject name: Forensic Medicine
In normal conditions the rate of cooling of body is 
Select and explain. 
A. 10 F/hour, B. 1.50 F/hour, C. 20 F/hour, D. 2.50 F/hour
B: 1.50 F/hour
Answer: B: 1.50 F/hour 
Explanation: Algor mois (Latin Algor: coolness, mois: death) or the chill of death is the cooling of the body that normally takes place after death, where the body temperature equilibrates with its environmental temperature. For temperate countries, Marshal and Hoare formula is used. The rates of fall of temperature in an average built person is 1degF upto 3 h, 2degF upto 9 h and 1.5degF up to 12 h. The rule of thumb is that the temperature falls at about 1.5degF/h. Ref - Krishan Vij textbook of forensic medicine and toxicology 5e pg : 79