This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
True about morula is 
Select and explain. 
A. 8-cell stage, B. 16-cell stage, C. 32-cell stage, D. 64-cell stage
B: 16-cell stage
Answer: B: 16-cell stage 
Explanation: Inderbir Singh&;s Human embryology; Tenth edition; Pg 50As cleavage proceeds, the ovum comes to have 16 cells. It now looks like a mulberry and is called the morula