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: Surgery
Bacteria that grow optimally between 25-40degC are called? 
Select and explain. 
A. Mesophiles, B. Psychrophiles, C. Thermophiles, D. Cryophiles
A: Mesophiles
Answer: A: Mesophiles 
Explanation: Mesophilic: * Bacteria which grow best at temperatures of 25-40degC are called mesophilic. * In this group some bacteria like pseudomonas aeruginosa have a wider range (5-43degC). * While others like the gonococcus have a restricted range (30-39degC) Psychrophilic bacteria: are bacteria that grow best at temperature below 20 C. * Some of them growing at temperature as low as - 7degC. * They are soil and water saprophytes. Thermophiles: grow best at high temperatures 55-80degC. * They may cause spoilage of under processed canned food. * Some thermophiles (like Bacillus stearothermophilus) form spores that are exceptionally thermoresistant.