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
Functions of limbic systema) Emotionb) Memoryc) Higher functiond) Planned motor activity 
Select and explain. 
A. ab, B. abc, C. acd, D. bcd
B: abc
Answer: B: abc 
Explanation: Main function of the limbic system is generation of emotions and the responses to those emotions, such as sexual behaviour, feeding behaviour, autonomic response, fear/rage, punishment/reward, memory, learning, vegetative and endocrine functions of hypothalamus.