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: Physiology
Main mechanism in thermoregulation-heat loss is 
Select and explain. 
A. Radiation, B. Evaporation, C. Conduction, D. Convection
A: Radiation
Answer: A: Radiation 
Explanation: Heat is lost from the body mainly by radiation (60%), evaporation (22%) and Conduction (18%).