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
Which is not increased in pregnancy : 
Select and explain. 
A. Vital capacity, B. Blood volume, C. Extracellular fluid, D. Weight
A: Vital capacity
Answer: A: Vital capacity 
Explanation: Vital capacity