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: Gynaecology & Obstetrics
The size of ovum is : 
Select and explain. 
A. 0.133 mm, B. 0.144 mm, C. 0.2 mm, D. None of the above
A: 0.133 mm
Answer: A: 0.133 mm 
Explanation: 0.133 mm