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
True about cerebelluma) Cerebral cortex have mostly inhibitory effectsb) Co-ordinationc) Planning of motor movementsd) Excitatory effect from deep nuclei 
Select and explain. 
A. abc, B. abd, C. acd, D. bcd
D: bcd
Answer: D: bcd 
Explanation: Cerebral cortex effects on cerebellum are all excitatory. Co-ordination is through spinocerebellum. Planning and programming of voluntary movements is through neo cerebellum. Deep nuclei outputs are always excitatory.