This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Residual bodies are 
Select and explain. 
A. Mitochondria, B. Nucleus, C. Golgi apparatus, D. Lysosomes
D: Lysosomes
Answer: D: Lysosomes 
Explanation: lysosomes Residual bodies are nothing but secondary lysosomes with undigested wastes. The digested materials are diffused into the cell cytoplasm through the lysosomal membrane. (Ref: www.sivabio.50web.com)