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
Nissil's granules contains 
Select and explain. 
A. Mitochondria, B. Golgi bodies, C. Smooth Endoplasmic reticulum, D. Ribosomes
D: Ribosomes
Answer: D: Ribosomes 
Explanation: Nissil's granules contains rough endoplasmic reticulum and ribosomes